CN213991014U

CN213991014U - Sound production module

Info

Publication number: CN213991014U
Application number: CN202023022461.9U
Authority: CN
Inventors: 陈思源
Original assignee: Chengdu Falante Technology Co ltd
Current assignee: Chengdu Falante Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-17
Anticipated expiration: 2030-12-15

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, in particular to a sounding module, which comprises a coil type bone conduction unit and a piezoelectric ceramic bone conduction unit, wherein the coil type bone conduction unit is provided with a vibration part and a fixed part which are arranged oppositely, and the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit are coaxially arranged; the piezoelectric ceramic bone conduction unit is arranged on one side of the vibration part of the coil type bone conduction unit, or the piezoelectric ceramic bone conduction unit is arranged on one side of the fixing part of the coil type bone conduction unit; through the coaxial setting between piezoceramics bone conduction unit and the coil form bone conduction unit, combined the respective advantage of coil form bone conduction unit and piezoceramics bone conduction unit, the scheme that the coaxial combination set up compares and uses piezoceramics bone conduction unit scheme and coil form bone conduction unit scheme alone, and the tone quality of the scheme that the coaxial combination set up is better, and the volume is bigger.

Description

Sound production module

Technical Field

The utility model belongs to the technical field of the electroacoustic conversion, especially, relate to a sounding module.

Background

The traditional bone conduction sound scheme uses a sound production unit with a coil type bone conduction unit scheme and a piezoelectric ceramic type bone conduction unit scheme in a large scale. The coil type bone conduction unit scheme has obvious defects of high sound quality, such as large medium-high frequency distortion and poor high-frequency extension details, and has the advantage that the low frequency can be better for the piezoelectric ceramic unit scheme. The piezoelectric ceramic bone conduction unit has the sound quality defects of a scheme, such as low frequency difference, insufficient thickness and weight of a sound sheet, and has the advantages of low distortion, more excellent medium-high frequency relative to a coil type bone conduction unit, and the requirement for a sounding module with high sound quality is met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sound production module aims at solving the not good enough technical problem of tone quality of the osteoacusis unit scheme among the prior art or piezoceramics formula osteoacusis unit scheme.

In order to achieve the above object, an embodiment of the present invention provides a sound module, which includes a coil type bone conduction unit and a piezoelectric ceramic bone conduction unit, wherein the coil type bone conduction unit has a vibration portion and a fixing portion which are oppositely disposed, and the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit are coaxially disposed; the piezoelectric ceramic bone conduction unit is arranged on one side of the vibration part of the coil type bone conduction unit, or the piezoelectric ceramic bone conduction unit is arranged on one side of the fixing part of the coil type bone conduction unit.

Optionally, the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit are respectively provided with a dedicated power amplifier driving module or share one power amplifier driving module, and the power amplifier driving modules are respectively electrically connected with the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit.

Optionally, the main board of the power amplifier driving module is attached to a unit module to form a module.

Optionally, a frequency divider circuit is disposed on the main board of the power amplifier driving module.

Optionally, the piezoelectric ceramic bone conduction unit includes a plurality of piezoelectric ceramic pieces, and the piezoelectric ceramic pieces are stacked or juxtaposed with each other; the coil type bone conduction unit comprises a plurality of bone conduction units, and the bone conduction units and the piezoelectric ceramic bone conduction units are stacked or juxtaposed with each other.

Optionally, the sound production module still includes shell and internally mounted structure, piezoceramics bone conduction unit perhaps coil type bone conduction unit is equipped with fixed knot and constructs, piezoceramics bone conduction unit with the medial surface butt of shell.

Optionally, the piezoceramic bone conduction unit is separately hermetically arranged or packaged in an open structure.

Optionally, the coil bone conduction unit and the piezoelectric ceramic bone conduction unit may be connected by double-sided tape, glue, annular hardware or plastic.

Optionally, the piezoelectric ceramic bone conduction unit is attached to a vibration portion of the coil type bone conduction unit, the vibration portion of the coil type bone conduction unit is made of a conductive material, and the attachment surface of the piezoelectric ceramic bone conduction unit and the coil type bone conduction unit is electrically conductive and serves as an electrode of the piezoelectric ceramic bone conduction unit.

Optionally, the piezoceramic bone conduction unit and the coil type bone conduction unit are arranged on the shell for sealed encapsulation, and the shell is provided with an air hole for tuning by adjusting the ventilation volume.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the vocal module have one of following technological effect at least: through the coaxial setting between piezoceramics unit and the coil form bone conduction unit, better tone quality performance has been accomplished in combination between it, the scheme that piezoceramics unit and coil form bone conduction unit combine, coil form bone conduction unit and the respective advantage of piezoceramics unit have been combined, it is low to combine the distortion of piezoceramics unit, the advantage that well high frequency is good with coil form bone conduction unit low frequency, sound advantage plump, the scheme contrast piezoceramics bone conduction unit scheme and coil form bone conduction unit scheme that the coaxial combination set up, the tone quality of the scheme that the coaxial combination set up is better, the volume is bigger.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a cross-sectional view of a sound module according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the sound module according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-coil type bone conduction unit 11-vibration part 12-fixing part

20-piezoelectric ceramic bone conduction unit 30-bottom shell 31-step

40-top cover.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-2 are exemplary and intended to be used to illustrate embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1, there is provided a sound module, including a coil type bone conduction unit 10 and a piezoelectric ceramic bone conduction unit 20, wherein the coil type bone conduction unit 10 has a vibration portion 11 and a fixing portion 12 which are oppositely disposed, and the coil type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20 are coaxially disposed; the piezoelectric ceramic bone conduction unit 20 is provided on the side of the vibration part 11 of the coil type bone conduction unit 10, or the piezoelectric ceramic bone conduction unit 20 is provided on the side of the fixing part 12 of the coil type bone conduction unit 10.

The embodiment of the utility model provides an in, through the coaxial setting between piezoceramics bone conduction unit 20 and the coil form bone conduction unit 10, better tone quality performance has been accomplished in combination between it, the scheme that piezoceramics bone conduction unit 20 and coil form bone conduction unit 10 combine, coil form bone conduction unit 10 and piezoceramics bone conduction unit 20 advantage each other has been combined, it is low to combine piezoceramics bone conduction unit 20 distortion, the advantage that medium-high frequency is good with coil form bone conduction unit 10 low frequency, the advantage that sound is plump, the scheme contrast piezoceramics bone conduction unit 20 scheme and coil form bone conduction unit 10 scheme that the coaxial combination set up, the tone quality of the scheme that the coaxial combination set up is better, the volume is bigger.

Specifically, the sound production module can be applied to sound production devices such as mobile phones, earphones, microphones and the like.

Specifically, the piezoelectric ceramic bone conduction unit 20 is coaxially combined with the coil type bone conduction unit 10. 1. The piezoelectric ceramic bone conduction unit 20 is bonded to the vibration portion 11 for sound emission of the coil type bone conduction unit 10. 2. The piezoelectric ceramic bone conduction unit 20 is attached to the fixing part 12 of the coil type bone conduction unit 10, and the sound generated by the piezoelectric ceramic bone conduction unit 20 is transmitted through the housing of the coil type bone conduction unit 10. 3. The piezoelectric ceramic bone conduction unit 20 and the coil type bone conduction unit 10 can be designed into hardware or plastic cement, and can be installed in a structure of a material suite such as silica gel, or can be directly connected in a mode of glue, gum, double-faced adhesive tape foam, clamping and the like, or can be directly installed in an internal structure of a product shell. 4. The piezoceramic bone conduction unit 20 and the coil-type bone conduction unit 10 may be provided in plurality, arranged in a coaxial configuration.

In another embodiment of the present invention, the coil-type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20 are respectively provided with a dedicated power amplifier driving module or share a power amplifier driving module, and the power amplifier driving module is electrically connected to the coil-type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20; the two power amplifier driving modules may respectively drive the coil type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20, or the power amplifier driving module may be one and simultaneously drive the coil type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20.

Specifically, the piezoelectric ceramic bone conduction unit 20 needs a high voltage and a low current, the higher the voltage is, the higher the sound pressure is, the larger the current is, the larger the coil type bone conduction unit 10 needs a large current, and the lower the voltage is, the higher the current is, the higher the sound pressure is, so that the piezoelectric ceramic bone conduction unit 20 and the coil type bone conduction unit 10 respectively use a special power amplifier, and the respective performance is better played, and the sound quality is better.

In another embodiment of the present invention, the main board of the power amplifier driving module of the sound module is attached to a unit module to form a module. A frequency divider circuit is arranged on a mainboard of a power amplifier driving module of the sounding module; wherein the frequency dividing circuit drives the coil type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20 respectively, or the frequency dividing circuit drives the coil type bone conduction unit 10 and the piezoelectric ceramic bone conduction unit 20 simultaneously.

Specifically, the piezoelectric ceramic bone conduction unit 20 may be configured with other driving modes besides the power amplifier chip, such as an audio circuit boosting module, a capacitor, a coil, and an inductive transformer.

In another embodiment of the present invention, the piezoelectric ceramic bone conduction unit 20 of the sound module includes a plurality of piezoelectric ceramic pieces, and the piezoelectric ceramic pieces are stacked or juxtaposed; the coil type bone conduction unit 10 includes a plurality of bone conduction units, which are stacked or juxtaposed with the piezoelectric ceramic bone conduction unit 20; the piezoelectric ceramic bone conduction unit 20 using the multilayer electrode has a high capacitance value and a high sound pressure, can be used as a full-frequency sounding unit, and is used for air conduction sounding and bone conduction sounding. The piezoceramic bone conduction unit 20 may be shaped as a circle, a square, a ring, an ellipse, etc., without limitation in shape and size.

Specifically, the plurality of piezoelectric ceramic plates can increase the sound production performance of the piezoelectric ceramic bone conduction unit 20 and improve the sound pressure advantage characteristic, and when the piezoelectric ceramic plates are combined with the coil type bone conduction unit 10, the piezoelectric ceramic bone conduction unit can play a role in enhancing medium-high frequency sound quality and increasing sound pressure. The plurality of coiled bone conduction units 10 may also serve to increase the sound pressure, enhancing the advantageous features of the coiled bone conduction units 10, such as: the increased number of the piezoelectric ceramic bone conduction units 20 can enhance medium-high frequency, the increased number of the coil type bone conduction units 10 can enhance low frequency and other effects, the number of the units is large, different materials and processes of different units can be used for tuning specific frequency, and tone quality is better.

In another embodiment of the present invention, the sound module of the sound module further includes a housing and an internal mounting structure, the piezoelectric ceramic bone conduction unit 20 or the coil bone conduction unit 10 is provided with a fixing structure, and the piezoelectric ceramic bone conduction unit 20 abuts against the inner side surface of the housing.

Specifically, the piezoelectric ceramic bone conduction unit 20 is provided with a fixing surface, and the piezoelectric ceramic bone conduction unit 20 is abutted against the inner side surface of the housing; do a shell according to piezoceramics bone conduction unit 20 shape, the inside vibration face of shell and the laminating of the 20 sound production electrode faces of piezoceramics bone conduction unit, in order to form open encapsulation, because piezoceramics bone conduction unit 20 frequency is high, can appear the high frequency on the part many on the actual product application, the low frequency is few on the part, can be according to the tuning demand, can reduce high frequency at a baffle of design between piezoceramics bone conduction unit 20 and shell vibration face, baffle thickness dimension and shape and structure can be designed according to actual demand, the material can be metal, the plastic, rubber, bubble cotton etc..

In another embodiment of the present invention, a vibration partition plate is disposed in the housing of the sound module, and two side surfaces of the vibration partition plate are respectively abutted against the inner side surface of the housing and the sound electrode surface of the piezoelectric ceramic bone conduction unit 20; wherein, the sound producing surface of the piezoelectric ceramic bone conduction unit 20 is directly attached to the vibration isolation plate or the vibration plate surface to realize solid encapsulation.

In another embodiment of the present invention, the piezoelectric ceramic bone conduction unit 20 of the sound module is separately sealed or packaged in an open structure.

In another embodiment of the present invention, the piezoelectric ceramic bone conduction unit 20 of the sounding module is attached to the vibration portion 11 of the coil type bone conduction unit 10, the vibration portion 11 of the coil type bone conduction unit 10 is made of a conductive material, and the attaching surfaces of the piezoelectric ceramic bone conduction unit 20 and the coil type bone conduction unit 10 are conductive and serve as an electrode of the piezoelectric ceramic bone conduction unit 20.

In another embodiment of the present invention, the piezoelectric ceramic bone conduction unit 20 and the coil bone conduction unit 10 of the sound module are sealed by a housing, and the housing is provided with an air hole for tuning by adjusting the ventilation amount.

In another embodiment of the present invention, a step 31 is disposed in the housing of the sound module, the piezoelectric ceramic bone conduction unit 20 is connected to the step 31, and the piezoelectric ceramic bone conduction unit 20 and the inner side surface of the housing are spaced apart from each other; place good piezoceramics bone conduction unit 20, outside laminating protection face lid, the fretwork can be done to the face lid, and according to tuning demand fretwork part can paste ventilative net tuning.

In another embodiment of the present invention, as shown in fig. 2, the sound module of the sound module further includes a top cover 40, the top cover 40 is connected to the housing for covering the piezoelectric ceramic bone conduction unit 20 and the coil type bone conduction unit 10; wherein, increase top cap 40 and form sealed encapsulation on open encapsulation basis, can reduce the sound that leaks outward, adjust piezoceramics bone conduction unit 20's sound tone quality, piezoceramics bone conduction unit 20's encapsulation shell forms sealed joint structure with top cap 40, reserves a aperture and reserves positive negative pole wire, 1, can adjust the sound at the shell trompil of backshell and subsides ventilative net according to actual tuning demand. 2. The negative pole backplate of piezoceramics bone conduction unit 20 can place the baffle, and the baffle material can be metal, rubber, inhales the sound cotton, and the bubble is cotton, materials such as plastic, and the shape size designs according to actual demand, plays to reduce outer sound leakage and adjusts tone quality effect.

In another embodiment of the present invention, the sound generating module of the sound generating module further includes a vibrating plate, the piezoelectric ceramic bone conduction unit 20 has a sound generating surface, and the vibrating plate is connected to the sound generating surface of the piezoelectric ceramic bone conduction unit 20; the vibrating plate has the following arrangement modes: 1. the piezoelectric ceramic bone conduction unit 20 has an excellent high frequency performance because the rigid vibrating plate (rigid back plate) is combined with the piezoelectric ceramic plate, and the shape of the vibrating plate can be circular, square, polygonal, annular and the like. 2. The movable vibration plate can be in a shape of a circle, a square, a polygon, a ring and the like. The vibrating plate can be made of elastic materials, such as elastic steel, rubber, and the like, and is designed to have an elastic structure, such as a spiral shape, a claw shape, and the like. The structure is beneficial to reducing the vibration frequency of the piezoelectric ceramic bone conduction unit 20 and improving the performance of medium and low frequencies.

Specifically, the vibrating plate is not limited to materials and shape structures, and mainly enhances the vibration performance of the piezoelectric ceramic bone conduction unit 20, the piezoelectric ceramic finished product is thin and brittle in material, small in vibration amplitude and low in sound pressure, the vibrating plate is increased to be more convenient to mount, the quality is more stable, the vibrating plate can also generate resonance to improve the vibration amplitude and improve the performance, and by using the flexible vibrating plate, the ultrahigh frequency can be reduced, and the medium-low frequency can be enhanced, so that the medium-low frequency can be improved, the ultrahigh frequency can be reduced, and when the vibrating plate is combined with the coil type bone conduction unit, the tone quality can be more conveniently adjusted.

In another embodiment of the present invention, the sound module of the sound module further comprises a flexible diaphragm; 1. a vibrating plate is attached to the sound producing surface of the piezoelectric ceramic bone conduction unit 20, and the vibrating plate is combined with a flexible vibrating membrane; 2. The bone conduction sounding surface of the piezoelectric ceramic unit is directly combined with the flexible vibrating diaphragm surface, the flexible vibrating diaphragm surface can be plated with a metal conducting layer, and the flexible vibrating diaphragm surface can be used as a positive electrode of the ceramic unit; 3. the sounding surface of the piezoelectric ceramic unit is attached to the flexible vibration film surface, the other surface of the flexible vibration film surface is correspondingly attached to a layer of vibration plate, the vibration plate can be made of plastic, metal, rubber and the like, and the shape and size parameters can be set according to actual requirements.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a vocal module which characterized in that: the bone conduction device comprises a coil type bone conduction unit and a piezoelectric ceramic bone conduction unit, wherein the coil type bone conduction unit is provided with a vibration part and a fixing part which are oppositely arranged, and the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit are coaxially arranged; the piezoelectric ceramic bone conduction unit is arranged on one side of the vibration part of the coil type bone conduction unit, or the piezoelectric ceramic bone conduction unit is arranged on one side of the fixing part of the coil type bone conduction unit.

2. The audible module as recited in claim 1, wherein: the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit are respectively provided with a special power amplifier driving module or share one power amplifier driving module, and the power amplifier driving modules are respectively electrically connected with the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit.

3. The audible module as recited in claim 2, wherein: the mainboard of the power amplifier driving module is attached to a unit module to form a module.

4. The audible module as recited in claim 2, wherein: and a frequency divider circuit is arranged on the mainboard of the power amplifier driving module.

5. The audible module as recited in claim 1, wherein: the piezoelectric ceramic bone conduction unit comprises a plurality of piezoelectric ceramic pieces, and the piezoelectric ceramic pieces are mutually stacked or parallel; the coil type bone conduction unit comprises a plurality of bone conduction units, and the bone conduction units and the piezoelectric ceramic bone conduction units are stacked or juxtaposed with each other.

6. The audible module as recited in claim 1, wherein: the sounding module still includes shell and internally mounted structure, piezoceramics bone conduction unit perhaps coil-type bone conduction unit is equipped with fixed knot and constructs, piezoceramics bone conduction unit with the medial surface butt of shell.

7. The sound generating module according to any one of claims 1 to 6, wherein: the piezoelectric ceramic bone conduction unit is independently arranged in a sealed mode or packaged in a ventilation structure.

8. The sound generating module according to any one of claims 1 to 6, wherein: the coil type bone conduction unit and the piezoelectric ceramic bone conduction unit can be connected through double faced adhesive tape, glue, annular hardware or plastic parts.

9. The sound generating module according to any one of claims 1 to 6, wherein: the piezoelectric ceramic bone conduction unit is attached to the vibration part of the coil type bone conduction unit, the vibration part of the coil type bone conduction unit is made of a conductive material, and the attaching surface of the piezoelectric ceramic bone conduction unit and the attaching surface of the coil type bone conduction unit are electrically conductive and serve as an electrode of the piezoelectric ceramic bone conduction unit.

10. The audible module as recited in claim 6, wherein: the piezoelectric ceramic bone conduction unit and the coil type bone conduction unit are arranged on the shell for sealed packaging, and the shell is provided with air holes for adjusting the ventilation volume.