CN217011186U - Vibration exciter and electronic device - Google Patents

Abstract

The vibration exciter of the utility model comprises: a vibrator assembly including an upper case and a magnetically conductive core; two opposite end heads of the magnetic conduction core are respectively fixed on the upper shell, and the two end heads are suspended in the air; the stator assembly comprises a lower shell, a magnet assembly and a coil, wherein the magnet assembly and the coil are fixed on one side of the lower shell; the coil comprises a central through hole, and the magnet assembly comprises two groups of magnets which are respectively positioned at two ends of the central through hole; the magnetically permeable core in the vibrator assembly passes through the central through hole of the coil. The electronic device of the present invention has the vibration exciter described above. The utility model aims to at least solve the problem that a vibration exciter is not easy to realize lightness and thinness.

Description

Vibration exciter and electronic device

Technical Field

The utility model belongs to the technical field of vibration devices, and particularly relates to a vibration exciter and electronic equipment with the same.

Background

Under the great trend of the popularity of full-screen electronic products, the screen sounding technology is more and more widely applied, and the existing screen sounding technology is mainly completed by an exciter. The traditional exciter mainly uses a magnet as a vibrator component, and the vibration of the magnet is utilized to drive a screen or a shell of the electronic equipment to vibrate and sound. To ensure that the actuator has sufficient driving force, it is generally required that the number of magnets be sufficiently large or that the weight be large. However, the light and thin structure is a continuous pursuit target of consumer electronics, which makes it difficult for the traditional exciter to combine light and thin with sound production driving force.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve the problem that a vibration exciter is not easy to realize lightness and thinness. This object is achieved by:

a first aspect of the present invention proposes a vibration exciter comprising:

the stator assembly comprises a lower shell, a magnet assembly and a coil, wherein the magnet assembly and the coil are fixed on one side of the lower shell; the coil comprises a central through hole, and the magnet assembly comprises two groups of magnets which are respectively positioned at two ends of the central through hole;

a vibrator assembly including an upper case, a bracket, and a magnetically conductive core; two ends of the magnetic conducting core are fixed on the upper shell through the bracket;

the magnetic conduction core penetrates through the central through hole, and the central through hole provides a vibration space for the magnetic conduction core.

According to the vibration exciter, the magnetic conduction core is set as the vibrator and is suspended in the coil, and the vibrator can vibrate under the action of an electromagnetic field to realize sound production, and has the structural characteristic of a moving iron type. On one hand, the lightening and thinning of the vibrator component are realized by utilizing the characteristic of 'light and thin' of the magnetic conduction core, and the sensitivity is more advantageous at high frequency under the condition of the same driving force; on the other hand, the number of magnets or the weight of the magnets does not need to be reduced, so that the original high driving force and low inductance of the exciter can be kept; in another aspect, the structure is simple and the material cost is low.

In addition, the vibration exciter according to the utility model may also have the following additional features:

in some embodiments of the present invention, further comprising a middle frame coupled to the lower case, the middle frame being located between the upper case and the lower case and surrounding the magnet assembly;

the middle frame and the lower shell are of an integrated or split structure;

and/or the presence of a gas in the gas,

still including connecting the epitheca with the elastic connector of inferior valve, elastic connector can follow the vibration direction elastic motion of magnetic conduction core.

In some embodiments of the present invention, the magnet assembly is bonded or welded to an inner sidewall of the middle frame.

In some embodiments of the utility model, the bracket is disposed between the coil and the two sets of magnets.

In some embodiments of the present invention, the bracket includes two flat plates, one end of each flat plate is fixedly connected to the upper shell, and the other end of each flat plate is provided with a limiting groove; the two ends of the magnetic conduction core are respectively positioned in the limiting grooves of the two flat plates.

In some embodiments of the present invention, the support and the upper shell are of a unitary structure, the support is two support members extending from the upper shell, and one end of each support member, which is far away from the upper shell, has an outer edge substantially parallel to the axial direction of the central through hole of the coil; the two ends of the magnetic conducting core are respectively bonded or welded on the outer edge of the supporting piece.

In some embodiments of the utility model, each support member comprises at least two support bars, each support bar having said outer edge.

In some embodiments of the utility model, the upper shell is an i-shaped flat plate comprising two flanges and a web located between the two flanges, the support member extending from the web;

the lower shell is a cross-shaped flat plate; or the lower shell is an I-shaped flat plate, and the lower shell corresponds to the lower shell in a staggered manner so as to shield all structures between the upper shell and the lower shell.

In some embodiments of the present invention, each of the two sets of magnets is formed by stacking a plurality of magnets, and the stacking direction is parallel to the vibration direction of the magnetic conductive core;

alternatively, the first and second electrodes may be,

each group of magnets consists of two magnets and a magnetic conduction plate positioned between the two magnets;

alternatively, the first and second electrodes may be,

each set of magnets is a halbach array of magnets.

In another aspect, the present invention further provides an electronic device, wherein the vibration exciter is any one of the above-mentioned electronic devices.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. Wherein:

fig. 1 is an exploded structural view of a vibration exciter according to one embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the interior of the vibration exciter of FIG. 1 (with the arrows on the magnet assembly indicating the direction of magnetization);

fig. 3 is a schematic cross-sectional view of the interior of the vibration exciter shown in fig. 1, the cross-section being perpendicular to the cross-section of fig. 1;

fig. 4 is an exploded structural view of a vibration exciter according to another embodiment of the present invention;

fig. 5 is a schematic sectional view of the inside of the vibration exciter shown in fig. 4;

fig. 6 is a schematic sectional view of the inside of the vibration exciter shown in fig. 4, the sectional view being perpendicular to the sectional view of fig. 5;

fig. 7 is a schematic sectional view of the inside of a vibration exciter according to still another embodiment of the present invention;

fig. 8 is a schematic sectional view of the inside of a vibration exciter of a further embodiment of the utility model;

fig. 9 is a schematic sectional view of the inside of a vibration exciter according to still another embodiment of the present invention;

the reference numerals in the drawings denote the following:

1-upper shell, 2-bracket, 3-middle frame, 4-magnet component, 401-magnet, 402-magnetic conductive plate, 5-magnetic conductive core, 6-coil, 7-lower shell, 8-support piece, 801-support strip.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The present invention provides an electronic device which can be a portable device such as a portable game terminal, a stationary game machine controller, a portable communication terminal such as a mobile phone or a smartphone, a portable information terminal such as a tablet computer, a home appliance such as a television, or a wearable terminal attached to clothing or an arm. The electronic device includes the vibration exciter of the present embodiment, and the vibration exciter is installed inside the electronic device as a vibration generation source, so that the vibration exciter drives the screen of the device such as a mobile phone or a computer to vibrate, thereby completing sound transmission.

As shown in fig. 1 to 6, the vibration exciter of the present embodiment includes a vibrator assembly and a stator assembly. The vibrator component comprises an upper shell 1, a magnetic conduction core 5 and a bracket 2, wherein two ends of the magnetic conduction core 5 are fixed on the upper shell 1 through the bracket 2. The stator assembly comprises a lower shell 7, a magnet assembly 4 and a coil 6, wherein the magnet assembly 4 and the coil 6 are fixed on the same side of the lower shell 7. The coil 6 includes a central through hole, and the magnet assembly 4 includes two sets of magnets respectively located at both ends of the central through hole. The magnetic conduction core 5 in the vibrator assembly passes through the central through hole of the coil 6, and the central through hole provides a vibration space for the magnetic conduction core 5. The upper shell 1 and the lower shell 7 surround a cavity, and the magnetic conduction core 5, the magnet assembly 4 and the coil 6 are all positioned in the cavity. The magnet assembly 4 forms magnetic lines of force which penetrate through a central through hole of the coil 6, the coil 6 generates current after being electrified, Lorentz force is generated under the action of a magnetic field, the magnetic conduction core 5 in the driving coil 6 vibrates in a reciprocating mode, meanwhile, the magnetic conduction core 5 can effectively gather the magnetic lines of force, and magnetic induction intensity is improved. Compared with the traditional exciter which takes the magnet as the vibrator, the exciter of the embodiment adopts the magnetic conduction core 5 as the vibrator, has lighter weight and thinner volume, is more beneficial to realizing the lightness and thinness of electronic equipment, has more advantage in high-frequency sensitivity under the condition of the same driving force, does not need to reduce the number of the magnet or the weight of the magnet, can keep the original high driving force and low inductance of the exciter, and also has the advantages of simple structure, low material cost and the like.

According to the vibration exciter of the utility model, the upper shell 1 and the magnetic conduction core 5 are realized by the bracket 2, the bracket 2 and the upper shell 1 can be integrated or split, and the bracket 2 is usually arranged between the coil 6 and the two groups of magnets so as not to obstruct the vibration of the magnetic conduction core 5.

Specifically, as shown in fig. 1 to 3, the bracket 2 may be configured as two flat plates, one end of each flat plate is fixedly connected with the upper casing 1, and the other end is provided with a limiting groove; two ends of the magnetic conduction core 5 are respectively positioned in the limiting grooves of the two flat plates. The limiting groove can be replaced by other connecting structures, such as detachable structures of bolts/nuts, pins, rivets and the like, or non-detachable structures of bonding, welding and the like.

Or as shown in fig. 4-6, the bracket 2 and the upper casing 1 may be one-piece, the bracket 2 is two supporting members 8 extending from the upper casing, and one end of each supporting member 8 away from the upper casing 1 has an outer edge substantially parallel to the axial direction of the central through hole of the coil 6; two ends of the magnetic conducting core 5 are respectively bonded or welded on the outer edge of the support member 8. The upper shell 1 is of an integrated structure, and the assembly process is simplified. Wherein, each supporting member 8 can be designed in a structure that a plurality of supporting bars 801 are arranged in a row, for example, two supporting bars 801, or three and so on supporting bars 801, and each supporting bar 801 has an outer edge.

According to the vibration exciter of the present invention, the upper case 1 and the lower case 7 may adopt a regular configuration such as a square panel or a deformed configuration. For example, as shown in fig. 4, the upper shell 1 is an i-shaped flat plate including two flanges and a web therebetween, and the support member 8 extends from the web. The lower shell 7 may be a cross-shaped flat plate as shown in fig. 4, which is in staggered correspondence with the i-shaped flat plate to shield all structures between the upper shell 1 and the lower shell 7; or, the lower casing 7 is an i-shaped flat plate, and the two i-shaped flat plates are staggered and correspond to each other to shield all structures between the upper casing 1 and the lower casing 7.

The vibration exciter according to the present invention, as shown in fig. 1 to 6, further comprises an intermediate frame 3 coupled to a lower case 7, the intermediate frame 3 being positioned between the upper case 1 and the lower case 7 and surrounding the magnet assembly 4 to effectively prevent magnetic leakage or to isolate the external environment, etc. The middle frame 3 and the lower shell 7 are of an integrated or split structure. Meanwhile, the magnet assembly 4 can be bonded or welded on the inner side wall of the middle frame 3 to reduce the space as much as possible.

The vibration exciter according to the utility model further comprises an elastic connecting piece connecting the upper shell 1 and the lower shell 7, wherein the elastic connecting piece can elastically move along the vibration direction of the magnetic conducting core 5. The elastic connecting piece connects the exciter into a whole, on one hand, the exciter is convenient to assemble, on the other hand, the exciter plays a certain limit on vibration, and invalid polarization is avoided.

According to the vibration exciter of the present invention, the structures of the two sets of magnets are various.

Specifically, as shown in fig. 7, each set of magnets is formed by stacking a plurality of magnets in a direction perpendicular to the axial direction of the central through hole of the coil 6, and magnetizing the magnets in a direction indicated by an arrow in the figure, so that the driving force and the sensitivity can be increased.

Or as shown in fig. 8, each set of magnets is composed of two magnets 401 and a magnetic conductive plate 402 located between the two magnets, and the driving force can also be improved.

Alternatively, as shown in fig. 9, each set of magnets is a halbach magnet array, and the driving force can be increased as well.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A vibration exciter, comprising:

the stator assembly comprises a lower shell, a magnet assembly and a coil, wherein the magnet assembly and the coil are fixed on one side of the lower shell; the coil comprises a central through hole, and the magnet assembly comprises two groups of magnets which are respectively positioned at two ends of the central through hole;

a vibrator assembly including an upper case, a bracket, and a magnetically conductive core; two ends of the magnetic conducting core are fixed on the upper shell through the bracket;

the magnetic conduction core penetrates through the central through hole, and the central through hole provides a vibration space for the magnetic conduction core.

2. The vibration exciter of claim 1, further comprising a middle frame coupled to the lower housing, the middle frame being positioned between the upper housing and the lower housing and surrounding the magnet assembly;

the middle frame and the lower shell are of an integrated or split structure;

and/or the presence of a gas in the gas,

still including connecting the epitheca with the elastic connector of inferior valve, elastic connector can follow the vibration direction elastic motion of magnetic conduction core.

3. A vibration exciter according to claim 2, wherein the magnet assembly is bonded or welded to the inner side wall of the middle frame.

4. A vibration exciter according to claim 1, wherein the support is provided between the coil and the two sets of magnets.

5. A vibration exciter according to claim 4, wherein the support comprises two plates, one end of each plate being fixedly connected to the upper housing and the other end being provided with a limiting groove; the two ends of the magnetic conducting core are respectively positioned in the limiting grooves of the two flat plates.

6. A vibration exciter according to claim 1, wherein the support is of unitary construction with the upper housing, the support being two supports extending from the upper housing, one end of each support remote from the upper housing having an outer edge substantially parallel to the axial direction of the central through bore of the coil; the two ends of the magnetic conducting core are respectively bonded or welded on the outer edge of the supporting piece.

7. A vibration exciter according to claim 6, wherein each support comprises at least two support bars, each support bar having the outer rim.

8. A vibration exciter according to claim 6, wherein the upper shell is an I-shaped flat plate comprising two flanges and a web therebetween, the support member extending from the web;

the lower shell is a cross-shaped flat plate; or the lower shell is an I-shaped flat plate, and the lower shell corresponds to the lower shell in a staggered manner so as to shield all structures between the upper shell and the lower shell.

9. A vibration exciter according to any of claims 1 to 8, wherein each of the two sets of magnets is formed by stacking a plurality of magnets in a direction parallel to the direction of vibration of the magnetically permeable core;

alternatively, the first and second electrodes may be,

each group of magnets consists of two magnets and a magnetic conduction plate positioned between the two magnets;

alternatively, the first and second electrodes may be,

each set of magnets is a halbach array of magnets.

10. An electronic device characterized in that the electronic device has a vibration exciter according to any one of claims 1 to 9.

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