CN214544762U - Loudspeaker module - Google Patents

Abstract

The utility model discloses a loudspeaker module, loudspeaker module includes shell fragment, vibrating diaphragm subassembly, drive assembly and basin frame, and the shell fragment still includes outer fixed part, be located the inboard central shell fragment of outer fixed part, and the linking arm of connecting outer fixed part and central shell fragment, outer fixed part is connected with the basin frame, and central shell fragment is connected with drive assembly, and still is connected with the driving medium on the central shell fragment, and vibrating diaphragm subassembly then is connected with the driving medium, the controlled central shell fragment of drive assembly and linking arm vibration, drive vibrating diaphragm subassembly synchronous vibration sound production through the driving medium, still be connected with the counter weight on the linking arm, the compliance of linking arm and/or the weight of counter weight are used for adjusting the output characteristic of vibration sound production. The utility model discloses a loudspeaker module passes through the shell fragment and adjusts output characteristic with the counter weight, easy to carry out in thin space, and when having guaranteed the medium-high frequency playback quality, has improved low frequency response performance, and then has promoted the full frequency channel sound playback quality of speaker.

Description

Loudspeaker module

The present application claims priority from chinese patent application No. 202120205091.8 entitled "a speaker module" filed on 25/1/2021, the entire contents of which are incorporated by reference in the present application.

Technical Field

The utility model relates to an electroacoustic conversion field, concretely design speaker module.

Background

The existing loudspeaker module is limited by the space design of the voice coil and the magnetic circuit system, so that better acoustic performance is difficult to ensure under the condition of meeting the thickness condition, and the vibration of the vibrating diaphragm with large amplitude easily causes swinging and rolling vibration to influence the performance of the loudspeaker. While piezoelectric speakers can guarantee a certain reproduction of medium and high frequency sound, the low frequency performance is not good.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a speaker module, which can realize large amplitude vibration of a vibrating diaphragm in a thin space, and the vibrating diaphragm does not swing or roll, so that the low frequency response is enhanced while the high frequency sound reproduction in the speaker is ensured.

An embodiment of the utility model provides a speaker module, include:

a basin stand;

the elastic piece comprises an outer fixing part, a connecting arm and a central elastic piece, the outer fixing part is arranged on the basin frame, the central elastic piece is positioned on the inner side of the outer fixing part, the connecting arm is connected with the outer fixing part and the central elastic piece, and a transmission part is further arranged on the central elastic piece;

the vibrating diaphragm component is connected with the transmission part; and

the driving assembly is connected with the central elastic sheet and is arranged to be controlled to drive the central elastic sheet and the connecting arm to vibrate, and then the driving piece drives the vibrating diaphragm assembly to synchronously vibrate and sound;

the connecting arm is further connected with a counterweight, and the compliance of the connecting arm and/or the weight of the counterweight are/is used for adjusting the output characteristic of the vibration sounding.

Furthermore, the outer fixing part is annular, and the central elastic sheet is long;

the connecting arm includes:

the connecting part is connected with the central elastic sheet, and the balance weight is connected with the connecting part; and

and the two ends of each cantilever are respectively connected with the inner periphery of the outer fixing part and the connecting part.

Further, the cantilever is wavy.

Further, the central spring piece comprises a first end and a second end;

the first end is connected with the transmission piece;

the second end is connected with the connecting portion.

Furthermore, the transmission part is columnar and fixedly penetrates through the first end;

the first end of the central elastic sheet extends towards the center of the vibrating diaphragm assembly from the connecting part, and the transmission part is connected to the center of the vibrating diaphragm assembly.

Further, the diaphragm assembly includes:

the vibrating diaphragm comprises a central part and a folding ring arranged around the central part, and the transmission part is connected with the central part; and

a dome connected to the center portion.

Further, the cross section of the folding ring is arc-shaped or S-shaped.

Further, the drive assembly includes:

the piezoelectric ceramic piece is connected with the central elastic piece; and

the circuit board is connected with the piezoelectric ceramic piece and is set to receive an alternating current signal to drive the piezoelectric ceramic piece to deform so as to drive the vibrating diaphragm component to vibrate.

Furthermore, the basin frame is also provided with at least one leakage hole, and the leakage hole is covered with a gauze.

Furthermore, the number of the elastic sheets and the number of the driving assemblies are two, and each group of the elastic sheets and the driving assemblies are connected to the vibrating diaphragm assembly through one driving piece.

The utility model discloses loudspeaker module passes through the shell fragment and adjusts output characteristic with the counter weight, easy to carry out in thin space, and when having guaranteed the medium-high frequency playback quality, has improved the low frequency response performance, and then has promoted the full frequency channel sound playback quality of speaker.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is an isometric view of a speaker module according to a first embodiment of the present invention;

fig. 2 is a sectional view of a speaker module according to a first embodiment of the present invention;

fig. 3 is an exploded view of a speaker module according to a first embodiment of the present invention;

fig. 4 is a perspective view of the spring plate and the transmission member according to the first embodiment of the present invention;

fig. 5 is an isometric view of a diaphragm assembly according to a first embodiment of the present invention;

fig. 6 is a top view of another elastic sheet according to the first embodiment of the present invention;

fig. 7 is a top view of another elastic sheet according to the first embodiment of the present invention;

fig. 8 is a cross-sectional view of a speaker module according to a second embodiment of the present invention;

fig. 9 is a cross-sectional view of a speaker module according to a third embodiment of the present invention.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1-5 are schematic views of a speaker module according to a first embodiment of the present invention. As shown in fig. 1-3, the speaker module includes a spring plate 1, a diaphragm assembly 2, a driving assembly 3, and a frame 4. The elastic sheet 1 includes an outer fixing portion 11, a central elastic sheet 13 located inside the outer fixing portion 11, and a connecting arm 12 connecting the outer fixing portion 11 and the central elastic sheet 13. The outer fixing part 11 is connected with the basin frame 4, the central elastic sheet 13 is connected with the driving component 3, a transmission piece 1311 is further arranged on the central elastic sheet 3, and the transmission piece 1311 is connected with the vibrating diaphragm component 2. The driving component 3 is controlled to drive the central elastic sheet 13 to vibrate, and the driving component 1311 drives the diaphragm component 2 to synchronously vibrate and sound. The vibration of the central elastic sheet 13 also drives the connecting arm 12 connected with the central elastic sheet to synchronously vibrate, the connecting arm 12 is connected with a counterweight 1211, and the compliance of the connecting arm 12 and/or the weight of the counterweight 1211 can adjust the vibration parameter of the vibrating diaphragm component 2, so that the sound reproduction quality of the loudspeaker module is improved.

The elastic sheet 1 may be made of a material having certain toughness and elongation ability, such as a metal or a polymer material. The elastic sheet 1 has certain compliance, the compliance refers to the softness degree of the elastic sheet 1, and the different compliance of the elastic sheet 1 enables the vibration system to have different eigenfrequencies during vibration. Specifically, the elastic sheet 1, the transmission member 1311 and the diaphragm component 2 form a vibration system, and the eigenfrequency F of the vibration system₀Comprises the following steps:

wherein M is_msTo the weight of the vibrating system, C_msIs the compliance of the vibration system. It will be appreciated that the eigenfrequency of the vibration system is inversely proportional to the weight and compliance of the vibration system, i.e. the higher the weight or compliance of the vibration system, the lower the value of the eigenfrequency of the vibration system.

Because the outer fixing part 11 of the elastic sheet 1 is fixedly connected with the basin frame 4, the outer fixing part 11 does not vibrate along with the basin frame. The vibration of the vibration system can be divided into two parts, one (hereinafter referred to as a first vibration system) is the vibration of the connecting arm 12 and the weight 1211 on the connecting arm 12, and the other (hereinafter referred to as a second vibration system) is the vibration of the center elastic piece 13, the transmission piece 1311 on the center elastic piece 13, and the vibrating diaphragm component 2 driven by the transmission piece 1311. The amplitude of the vibration system is formed by the superposition of the partial amplitudes of the two parts of vibration.

The connecting arm 12 is made of a special structural design and/or material to improve the compliance, and a counterweight 1211 is added to improve the compliance and the weight of the first vibration system, so that a lower resonant frequency is obtained. That is, the eigenfrequency of the first vibration system including the connecting arm 12 and the weight 1211 is lower than the resonance frequency of the second vibration system including the center spring 13, the driving member 1311, and the diaphragm assembly 2.

When the vibration frequency input to the driving assembly 3 is in the vicinity of the resonance frequency of the first vibration system, for example, the driving assembly 3 may include a piezoelectric ceramic, and when the frequency of the alternating current signal input to the piezoelectric ceramic is in the vicinity of the resonance frequency of the first vibration system, the connecting arm 12 starts to resonate and generates a large amplitude. At this time, the frequency of the driving part 1311 driving the vibrating diaphragm component 2 to vibrate is composed of two parts, namely, the deformation vibration generated by the first vibration system driven by the driving component 3 and caused by resonance, and the deformation vibration generated by the second vibration system driven by the driving component 3, wherein the two vibrations have the same phase and are superposed, and the superposed amplitude is increased. The vibration is transmitted to the diaphragm component 2 by the transmission member 1311, so that the diaphragm component 2 generates a large vibration displacement near the resonant frequency of the first vibration system, and the frequency response and the sensitivity of the loudspeaker module are improved at the frequency point. Therefore, by adjusting the shape, quantity, material and/or weight of the connecting arm 12, the amplitude near the position of the low-frequency resonant frequency point can be adjusted, and the position and amplitude of the frequency point of the low-frequency response of the speaker module can be adjusted accordingly, so as to improve the full-band output characteristics of the speaker module.

As shown in fig. 4, in the present embodiment, the outer fixing portion 11 is annular and has a hollow middle portion. The central elastic sheet 13 is a long sheet and includes a first end 131 and a second end 132, the transmission member 1311 is fixedly connected to the first end 131, and the central elastic sheet 13 is located inside the outer fixing portion 11 and spaced apart from the outer fixing portion 11. The connecting arm 12 includes a connecting portion 121 and two suspension arms 122. The connecting portion 121 is rectangular sheet-shaped, the difference between the length and the width of the rectangular sheet-shaped is not large, and the rectangular sheet-shaped is approximately square, and the middle of one side of the connecting portion 121 is connected to the second end 132 of the central elastic sheet 13. Both ends of each cantilever 122 are respectively connected to the inner periphery of the outer fixing portion 11 and the connecting portion 121, and more specifically, the positions where the two cantilevers 122 are connected to the connecting portion 121 in this embodiment are both ends of the side where the connecting portion 121 is connected to the center spring 13. Therefore, the central elastic sheet 13 can drive the connecting arm 12, the transmission member 1311 and the diaphragm assembly 2 to vibrate under the driving of the driving assembly 3.

In some other alternative implementations, the number of the cantilever 122 may be one, or may be two or more, and the position where the cantilever 122 is connected to the connecting portion 121 may also be any position on the connecting portion 121. Thereby, the same effect can be achieved, and the present embodiment is not limited thereto.

In this embodiment, the cantilever 122 has a wave shape, as shown in fig. 4. It should be understood that in some other alternative implementations, the cantilever 122 may be any shape, for example, as shown in fig. 6 and 7, the cantilever 122 may be a rectangular elongated shape or a curved dogleg shape. The shape of the suspension arm 122 can be adjusted according to the output requirement of the speaker module, so that the adjustment of the spring plate 1 to the characteristics of the speaker module is better.

In the present embodiment, as shown in fig. 2 and 3, the weight 1211 is connected to the connection part 121. It should be understood that in some other alternative implementations, the counterweight 1211 may be disposed on the suspension arm 122, or disposed on the connecting portion 121 and the suspension arm 122, so that the same effect can be achieved, and the present embodiment is not limited thereto.

As shown in fig. 2-4, in the embodiment, the projection of the connection portion 121 on the diaphragm assembly 2 is spaced from the center of the diaphragm assembly 2, and the first end 131 of the central elastic piece 13 extends from the connection portion 121 toward the center of the diaphragm assembly 2. The driving member 1311 is cylindrical and fixedly penetrates through the first end 131 of the central elastic sheet 13, and the upper end of the driving member 1311 extends out of the upper end face of the central elastic sheet 13 and is connected to the center of the diaphragm assembly 2. From this, driving medium 1311 drives the central region vibration of vibrating diaphragm subassembly 2 to drive vibrating diaphragm subassembly 2 whole vibration, make vibrating diaphragm subassembly 2's vibration more even.

In some other alternative implementations, the transmission member 1311 may also be rod-shaped, cone-shaped, or truncated, and the transmission member 1311 may also be connected to a position other than the center of the diaphragm assembly 2, so that the same effect can be achieved, and the embodiment is not limited thereto.

As shown in fig. 2 and 3, in the present embodiment, the driving assembly 3 includes a piezoelectric ceramic plate 31 and a circuit board 32. The piezoelectric ceramic piece 31 is connected with the central elastic piece 13, and the circuit board 32 is connected with the piezoelectric ceramic piece 31. A connecting line (not shown in the figure) is further led out from the circuit board 32, the connecting line can be led out from a gap on the basin frame 4 and connected to an external control end (not shown in the figure), and the control end inputs an alternating current signal with a preset frequency to the circuit board 32 so as to drive the piezoelectric ceramic piece 31 to periodically stretch and deform, and further drive the central elastic piece 13 and the diaphragm assembly 2 to vibrate. The frequency of the vibration of the diaphragm assembly 2 is related to the frequency of the alternating current signal input by the control end, and the vibration frequency of the diaphragm assembly 2 can be adjusted through the control end.

The piezoelectric ceramic plate 31 may be glued to the lower end surface of the central elastic sheet 13. The circuit board 32 may be a flexible circuit board, and is glued to the lower end surface of the piezoelectric ceramic plate 31. The control terminal can be a computer.

The piezoelectric driving mode is precise in driving, stable in vibration, low in rolling vibration trend and good in high-frequency positioning effect, so that the output characteristic of the loudspeaker module is more stable. It should be understood that, in some other alternative implementations, the driving assembly 3 may also include a voice coil, a magnetic circuit system, etc., that is, a speaker module driven electromagnetically, so that the low-frequency response of the speaker module may also be enhanced and the full-band output performance of the speaker module may also be improved based on the configuration of the elastic sheet 1.

As shown in fig. 2 and 5, in the present embodiment, the diaphragm assembly 2 includes a diaphragm 21 and a dome 22. The diaphragm 21 includes a center portion 211 and a corrugated rim 212 disposed around the center portion 211, the driving member 1311 is connected to a lower end surface of the center portion 211, and the dome 22 is connected to an upper end surface of the center portion 211. The corrugated rim 212 is used to vibrate and sound together with the central portion 211, and the dome 22 is used to enhance the local rigidity of the diaphragm 21 and optimize the vibration effect.

It is noted that in the present embodiment, as shown in fig. 2 and 5, the edge 212 is formed in an arc shape and is substantially at the same level as the central portion 211.

As shown in fig. 2 and 3, in the present embodiment, the speaker module further includes a support member 5, and the support member 5 has a frame-like structure and is shaped and sized to match the outer edge of the frame 4. The supporting piece 5 is arranged on the basin frame 4, and the lower end surface of the supporting piece and the basin frame 4 are pressed together to clamp the outer fixing part 11 of the elastic sheet 1, so that the elastic sheet 1 and the basin frame 4 are fixed; the diaphragm 21 is connected to the upper end face thereof, and in particular, it is understood that the outer edge of the corrugated rim 212 of the diaphragm 21 is also frame-shaped or ring-shaped, and may be connected to the supporting member 5.

The outer edge of the diaphragm 21 is fixedly connected with the support member 5, and the central area is fixedly connected with the transmission member 1311, so that the diaphragm can vibrate and sound under the driving of the transmission member 1311. Moreover, it is easy to understand that the frame 4 is a structure similar to a housing, the elastic sheet 1 and the driving component 3 are both located inside the frame 4, the diaphragm component 2 is connected to one side of the frame 4, and the supporting component 5 is used for supporting and fixing the internal structure together with the frame 4.

As shown in fig. 2 and 3, in the present embodiment, two sides of the bottom of the frame 4 are respectively provided with a leakage hole 41, and the leakage holes 41 are covered with a gauze 411, and the gauze 411 can be adhered to the frame 4 by an adhesive edge. The leakage hole 41 is used for balancing the air pressure inside and outside the loudspeaker module, so that the performance unbalance of the vibrating diaphragm component 2 under long-time vibration is avoided, and the gauze 411 is used for preventing dust inside the loudspeaker module. Wherein, the other side of the bottom finger bowl frame 4 opposite to the side connected with the vibrating diaphragm component 2, the leakage hole 41 is arranged at the bottom to avoid other parts so as to avoid mutual influence.

It should be understood that the leakage holes 41 may be disposed at other positions of the frame 4, such as the side, and the number of the leakage holes 41 may be one, or two or more, which is not limited by the embodiment.

The loudspeaker module shell fragment of this embodiment adjusts output characteristic with the counter weight, easily implements in thin space, and when having guaranteed well high frequency playback quality, has improved the low frequency response performance, and then has promoted the full frequency channel sound playback quality of speaker.

Fig. 8 is a cross-sectional view of a speaker module according to a second embodiment of the present invention. As shown in fig. 8, the cutting direction of fig. 8 is the same as the cutting direction of the a-a section of the speaker module according to the first embodiment of the present invention. The speaker module of the present embodiment is different from the speaker module of the first embodiment in that the dome structure and the corrugated rim structure of the speaker module of the present embodiment are different, and the other structures are the same as those of the speaker module of the first embodiment.

As shown in fig. 8, in the present embodiment, the edge 212 is formed in an S-shape with a significant height difference from the central portion 211; the area of the dome 22 is increased (not shown) to increase the vibration area and improve the sensitivity of the speaker module. The corrugated rim 212 with the S-shaped cross section is matched with the large dome design, so that the amplitude of the diaphragm assembly 2 is significantly increased when the diaphragm assembly vibrates, and the frequency response of the loudspeaker module is further increased.

In addition, in the embodiment, in order to match the height difference caused by the S-shaped corrugated rim 212, the longitudinal dimension of the transmission member 1311 may be increased appropriately, so that the transmission member 1311 may still be connected to the diaphragm assembly 2.

Fig. 3 is a cross-sectional view of a speaker module according to a third embodiment of the present invention. As shown in fig. 9, the cutting direction of fig. 9 is the same as the cutting direction of the a-a section of the speaker module according to the first embodiment of the present invention. The speaker module in this embodiment is different from the speaker module in the first embodiment in that the speaker module includes two sets of elastic pieces 1 and a driving component 3, and each set of elastic pieces 1 and driving component 3 is connected to the diaphragm component 2 through a transmission component 1311.

In this embodiment, the structure of each component and the connection manner between each component may be the same as those of the speaker module of the first embodiment. As shown in fig. 9, two sets of shrapnels 1 and the driving component 3 can be symmetrically arranged on two sides of the basin frame 4, the driving effect of the loudspeaker module is enhanced by the arrangement of the two sets of driving units, and the full-band sound reproduction of the loudspeaker module is further improved.

The utility model discloses a speaker module all has good sound playback quality at full frequency channel, can be applied to the sound playback of each frequency channel.

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

Claims (10)

1. A speaker module, comprising:

a basin stand (4);

the elastic sheet (1) comprises an outer fixing part (11), a connecting arm (12) and a central elastic sheet (13), the outer fixing part (11) is arranged on the basin frame (4), the central elastic sheet (13) is positioned on the inner side of the outer fixing part (11), the connecting arm (12) is connected with the outer fixing part (11) and the central elastic sheet (13), and a transmission part (1311) is further arranged on the central elastic sheet (13);

the vibrating diaphragm component (2) is connected with the transmission piece (1311); and

the driving assembly (3) is connected with the central elastic sheet (13), and the driving assembly (3) is controlled to drive the central elastic sheet (13) and the connecting arm (12) to vibrate, so that the vibrating diaphragm assembly (2) is driven by the driving piece (1311) to synchronously vibrate and sound;

wherein a counterweight (1211) is further connected to the connecting arm (12), and the compliance of the connecting arm (12) and/or the weight of the counterweight (1211) are used to adjust the output characteristics of the vibratory sound production.

2. A speaker module according to claim 1, wherein the outer fixing portion (11) is ring-shaped, and the central resilient piece (13) is long-piece-shaped;

the connecting arm (12) comprises:

the connecting part (121) is connected with the central elastic sheet (13), and the counterweight (1211) is connected with the connecting part (121); and

at least one cantilever (122), both ends of each cantilever (122) being connected with the inner circumference of the outer fixing portion (11) and the connecting portion (121), respectively.

3. A loudspeaker module according to claim 2, wherein the suspension (122) is undulated.

4. A loudspeaker module according to claim 2, wherein the center spring (13) comprises a first end (131) and a second end (132);

the first end (131) is connected with the transmission piece (1311);

the second end (132) is connected to the connecting portion (121).

5. A loudspeaker module according to claim 4, wherein the transmission member (1311) is cylindrical and is fixedly disposed through the first end (131);

the first end (131) of the central elastic sheet (13) extends from the connecting part (121) towards the center of the diaphragm assembly (2), and the transmission piece (1311) is connected to the center of the diaphragm assembly (2).

6. A loudspeaker module according to claim 1, wherein the diaphragm assembly (2) comprises:

the vibrating diaphragm (21) comprises a central part (211) and a corrugated rim (212) arranged around the central part (211), and the transmission piece (1311) is connected with the central part (211); and

a dome (22) connected to the center portion (211).

7. A loudspeaker module according to claim 6, wherein the cross-section of the edge (212) is arcuate or S-shaped.

8. A loudspeaker module according to claim 1, wherein the drive assembly (3) comprises:

the piezoelectric ceramic piece (31) is connected with the central elastic piece (13); and

the circuit board (32) is connected with the piezoelectric ceramic piece (31), and the circuit board (32) is set to receive an alternating current signal to drive the piezoelectric ceramic piece (31) to deform so as to drive the vibrating diaphragm component (2) to vibrate.

9. A loudspeaker module according to claim 1, wherein the frame (4) is further provided with at least one leakage hole (41), and the leakage hole (41) is further covered with a gauze (411).

10. A loudspeaker module according to any one of claims 1-4, wherein there are two spring plates (1) and two drive assemblies (3), and each set of spring plates (1) and drive assemblies (3) is connected to the diaphragm assembly (2) by one of the transmission members (1311).

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