阅读说明：本技术 一种具有中心压电体支承振膜的受话器 (Telephone receiver with central piezoelectric body supporting vibrating diaphragm ) 是由 吴宗汉 张绍年 陈为波 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种具有中心压电体支承振膜的受话器,包括壳体,壳体内依次封装有金属垫圈、振膜组件、绝缘垫环和垫板,振膜组件包括金属膜环和振膜；壳体内还设有压电体；压电体的第一端固定于垫板的内侧表面,且与垫板的外侧表面上设置的接线端子电连接；压电体的第二端支撑并连接于振膜的中心,且通过振膜组件与壳体电连接；当接线端子和壳体被施加音频交流电压时,压电体振动发声,且振膜在压电体的驱动下振动发声。本发明的受话器,由压电体振动和振膜振动实现发声,在频响上互补,在低、中、高全频段都有较好的发声效果。本发明的受话器,还具有功耗小、效率高、结构简单、制造工艺简单、便于微型化等优点。(The invention discloses a telephone receiver with a central piezoelectric body supporting diaphragm, which comprises a shell, wherein a metal gasket, a diaphragm assembly, an insulating backing ring and a backing plate are sequentially packaged in the shell, and the diaphragm assembly comprises a metal film ring and a diaphragm; a piezoelectric body is also arranged in the shell; the first end of the piezoelectric body is fixed on the inner side surface of the backing plate and is electrically connected with a wiring terminal arranged on the outer side surface of the backing plate; the second end of the piezoelectric body is supported and connected with the center of the vibrating diaphragm and is electrically connected with the shell through the vibrating diaphragm component; when the connecting terminal and the shell are applied with audio alternating-current voltage, the piezoelectric body vibrates to sound, and the vibrating diaphragm vibrates to sound under the driving of the piezoelectric body. The telephone receiver of the invention realizes sound production by piezoelectric body vibration and vibrating diaphragm vibration, is complementary in frequency response, and has better sound production effect in low, medium and high full frequency bands. The telephone receiver of the invention also has the advantages of low power consumption, high efficiency, simple structure, simple manufacturing process, convenient miniaturization and the like.)

1. A telephone receiver with a central piezoelectric body supporting vibrating diaphragm is characterized by comprising a shell, wherein a metal gasket, a vibrating diaphragm assembly, an insulating backing ring and a backing plate are sequentially packaged in the shell, and the vibrating diaphragm assembly comprises a metal film ring and a vibrating diaphragm adhered to the metal film ring;

a piezoelectric body positioned between the backing plate and the vibrating diaphragm is also arranged in the shell; the first end of the piezoelectric body is fixed on the inner side surface of the backing plate and is electrically connected with a wiring terminal arranged on the outer side surface of the backing plate; the second end of the piezoelectric body is supported and connected to the center of the vibrating diaphragm and is electrically connected with the shell through the vibrating diaphragm assembly;

when binding post with the casing is applyed audio frequency alternating voltage, the piezoelectricity vibration sound production, just the vibrating diaphragm is in the vibration sound production under the drive of piezoelectricity.

2. A receiver having a central piezoelectric support diaphragm according to claim 1, wherein,

the inner side surface of the backing plate is provided with a first metal layer which is electrically connected with the piezoelectric body and is insulated with the shell, the outer side surface of the backing plate is provided with a second metal layer which is electrically connected with the wiring terminal and is insulated with the shell, and the first metal layer and the second metal layer are electrically connected through a metalized through hole.

3. A receiver having a central piezoelectric support diaphragm according to claim 2, wherein,

the base plate is a double-sided copper-clad plate with metal layers on the surfaces of two sides, and the metal layers on the double-sided copper-clad plate, which are close to the edge area of the shell, are etched and removed.

4. A receiver having a central piezoelectric support diaphragm according to claim 1, wherein,

one surface of the vibrating diaphragm, which is connected with the piezoelectric body, is provided with a metalized coating, and the end surfaces of two ends of the piezoelectric body are provided with metalized coatings.

5. A receiver having a central piezoelectric support diaphragm according to claim 1, wherein,

and a needle-shaped contact is arranged in the center of the vibrating diaphragm and is connected with the piezoelectric body through a conductive adhesive.

6. A receiver having a central piezoelectric support diaphragm according to claim 1, wherein,

the piezoelectric body is a cylindrical piezoelectric body.

Technical Field

The invention relates to the technical field of acoustic devices, in particular to a telephone receiver with a central piezoelectric body supporting diaphragm.

Background

Receiver is called Receiver in English, and is an electroacoustic device which takes ear pit as coupling cavity to convert audio frequency electric signal into sound signal under the condition of no sound leakage. The receiver converts electric energy into sound energy through physical effect, and can be divided into various types such as electromagnetic type, piezoelectric type, capacitance type or electrodynamic type according to the physical effect of different electroacoustic conversion. Different types of receivers often have different performances in different frequency bands, and are difficult to have better effects in low, medium and high frequencies.

Disclosure of Invention

The invention aims to provide a receiver with a central piezoelectric body supporting diaphragm, which is used for improving the sound effect of the receiver and simplifying the structure and the process of the receiver.

In order to achieve the purpose, the invention adopts the technical scheme that: a telephone receiver with a central piezoelectric body supporting vibrating diaphragm comprises a shell, wherein a metal gasket, a vibrating diaphragm assembly, an insulating backing ring and a backing plate are sequentially packaged in the shell, and the vibrating diaphragm assembly comprises a metal film ring and a vibrating diaphragm adhered to the metal film ring; a piezoelectric body positioned between the backing plate and the vibrating diaphragm is also arranged in the shell; the first end of the piezoelectric body is fixed on the inner side surface of the backing plate and is electrically connected with a wiring terminal arranged on the outer side surface of the backing plate; the second end of the piezoelectric body is supported and connected to the center of the vibrating diaphragm and is electrically connected with the shell through the vibrating diaphragm assembly; when binding post with the casing is applyed audio frequency alternating voltage, the piezoelectricity vibration sound production, just the vibrating diaphragm is in the vibration sound production under the drive of piezoelectricity.

In one possible implementation manner, the inner side surface of the pad has a first metal layer electrically connected to the piezoelectric body and insulated from the housing, the outer side surface of the pad has a second metal layer electrically connected to the connection terminal and insulated from the housing, and the first metal layer and the second metal layer are electrically connected through a metalized through hole.

In a possible implementation manner, the backing plate is a double-sided copper-clad plate with metal layers on the surfaces of two sides, and the metal layers on the double-sided copper-clad plate, which are close to the edge area of the shell, are removed by etching.

In a possible implementation manner, one surface of the diaphragm, which is connected to the piezoelectric body, is provided with a metalized coating, and end surfaces of both ends of the piezoelectric body are provided with metalized coatings.

In a possible implementation manner, a needle-shaped contact is arranged in the center of the vibrating diaphragm, and the needle-shaped contact is connected with the piezoelectric body through a conductive adhesive.

In one possible implementation, the piezoelectric body is a cylindrical piezoelectric body.

According to the technical scheme, the embodiment of the invention has the following advantages:

1. the telephone receiver provided by the invention is driven by the piezoelectric body to vibrate and drive the diaphragm to vibrate and sound, has the advantages of low power consumption and high efficiency, and also has the advantages of simple structure, simple manufacturing process, easiness in operation, convenience for further miniaturization and the like.

2. When the telephone receiver provided by the invention is acted by audio alternating-current voltage, on one hand, the piezoelectric body vibrates to produce sound, and meanwhile, the piezoelectric body acts on the vibrating diaphragm, so that the vibrating diaphragm is driven to vibrate to produce sound. The piezoelectric body vibrates to produce sound, and the frequency response range is medium and high, and the low-frequency characteristic is poor; the low-frequency part of the frequency response characteristic of the driving diaphragm for vibrating and sounding is better; the combination of the two has complementary effect on frequency response, and realizes better sound production effect in low, medium and high full frequency bands.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the embodiment and the drawings used in the description of the prior art.

Fig. 1 is a schematic structural diagram of a receiver having a central piezoelectric body supporting diaphragm according to embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a diaphragm assembly of a receiver having a central piezoelectric body supporting a diaphragm according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following will explain details by way of specific examples.

The embodiment of the invention provides a receiver (micro loudspeaker) with a central piezoelectric body supporting diaphragm.

Vibrating diaphragms of common receivers are mainly in shapes of circles, directed circles, squares, rectangles, racetrack directed squares and the like, and the vibrating diaphragms are fixed on the periphery. This patent proposes a vibrating diaphragm is fixed all around to have the structure of central piezoelectricity body supporting vibrating diaphragm.

The technical principle of the telephone receiver of the embodiment of the invention is as follows.

As a receiver having a central piezoelectric body supporting diaphragm, it can be simplified in principle into two parts: one is a diaphragm assembly system with a central rigid support, and the analysis of the diaphragm assembly system is the analysis of a diaphragm assembly system with a central rigid support; the other is a piezoelectric body supporting the center of the diaphragm, which is a columnar piezoelectric body with one fixed end and one free end, and when the piezoelectric body is subjected to a voltage applied in the axial direction (i.e. the direction perpendicular to the plane of the diaphragm), the piezoelectric body deforms in the axial direction, the magnitude of the deformation is determined by the piezoelectric coefficient d33 of the piezoelectric body, and if the applied voltage is an alternating signal voltage, the deformation changes correspondingly with the alternating signal voltage. Therefore, when the audio alternating voltage is used for acting, on one hand, the piezoelectric body vibrates to generate sound, and meanwhile, the piezoelectric body acts on the diaphragm, so that the diaphragm is driven to vibrate to generate sound.

The receiver of the invention is a receiver (micro loudspeaker) which vibrates by a central piezoelectric body and drives a vibrating diaphragm supported by the receiver to vibrate and produce sound, which is different from a common moving-coil receiver and has the advantages of low power consumption, low heat generation and high efficiency; also has the advantages of simple structure, convenient manufacturing process and easy operation; but also can be further miniaturized and popularized to the field of microelectronic devices.

When the telephone receiver provided by the invention is acted by audio alternating-current voltage, on one hand, the piezoelectric body vibrates to produce sound, and meanwhile, the piezoelectric body acts on the vibrating diaphragm, so that the vibrating diaphragm is driven to vibrate to produce sound. The piezoelectric body vibrates to produce sound, and the frequency response range is medium and high, and the low-frequency characteristic is poor; the low-frequency part of the frequency response characteristic of the driving diaphragm for vibrating and sounding is better; the combination of the two has complementary effect, and the low, medium and high full frequency bands have better effect.

Fig. 1 is a schematic structural diagram of a receiver having a central piezoelectric body supporting diaphragm according to embodiment 1 of the present invention.

As shown in fig. 1, the receiver comprises a housing 7, and a metal gasket 1, a diaphragm assembly 2, an insulating gasket 4 and a backing plate 5 are sequentially packaged in the housing 7 from one end to the other end. The vibrating diaphragm component 2 comprises a metal film ring 21 and a vibrating diaphragm 22 adhered to the metal film ring, and one surface of the vibrating diaphragm 22 facing the backing plate 5 is provided with a metalized coating.

The shell 7 is further provided with a piezoelectric body 3 located between the backing plate 5 and the diaphragm 22, and the piezoelectric body 3 may be a cylindrical piezoelectric body (or called a piezoelectric cylinder). The first end of the piezoelectric body 3 is fixed on the inner side surface of the backing plate 5 and is electrically connected with a wiring terminal 9 arranged on the outer side surface of the backing plate 5; the second end of the piezoelectric body 3 is supported and connected to the center of the diaphragm 22, and is electrically connected to the housing 7 through the diaphragm assembly 2. The end surfaces of the two ends of the piezoelectric body 3 are provided with metalized coatings, so as to be electrically connected with the diaphragm 22 and the backing plate 5.

The backing plate 5 can be a double-sided copper-clad plate with metal layers 8 on the surfaces of two sides, and the metal layers 8 on the double-sided copper-clad plate, which are close to the edge area (outer ring part) of the shell 7, are etched and removed to ensure mutual insulation with the shell 7.

The metal layers 8 of both side surfaces of the backing plate 5 include: a first metal layer having an inner surface electrically connected to the piezoelectric body 3 and insulated from the case 7, and a second metal layer having an outer surface electrically connected to the connection terminal 9 and insulated from the case 7. The first and second metal layers on the two side surfaces of the shim plate 5 may be electrically connected by means of metallized through holes 6 extending through the shim plate 5.

The audio signal is an alternating voltage, and can be input through the shell 7 and the connecting terminal 9, so that the upper and lower end surfaces of the piezoelectric body 3 supported at the center have voltage input action, the piezoelectric body 3 has a larger piezoelectric coefficient d33, when a voltage is applied in the axial direction (i.e. the direction perpendicular to the plane of the diaphragm), the deformation is generated in the axial direction, the magnitude of the deformation is determined by the piezoelectric coefficient d33, and if the applied voltage is an alternating signal voltage, the deformation change is changed correspondingly with the alternating signal voltage. Thus, when an audio ac voltage is applied, on the one hand, the piezoelectric body vibrates to produce sound, and on the other hand, the piezoelectric body acts on the diaphragm 2 to drive the diaphragm to vibrate and produce sound.

Referring to fig. 2, embodiment 2 of the present invention provides a schematic structural diagram of a diaphragm assembly of a receiver having a central piezoelectric body supporting a diaphragm.

In this embodiment, a needle-shaped contact 10 is disposed in the center of the diaphragm, and the needle-shaped contact 10 is connected to the piezoelectric body through a conductive adhesive. The needle-shaped contact can be in good contact with the piezoelectric body 3, conductive adhesive is coated at the contact position to ensure that the needle-shaped contact is firmly contacted with the piezoelectric body and the electric conduction is good, and the needle-shaped contact is connected with the metalized coating of the vibrating diaphragm and the metal film ring to ensure that the second end face of the piezoelectric body can be electrically connected to the shell 7.

Optionally, the needle-like contact may be a metal piece with a rivet structure or a rivet structure, and is nailed or fastened on the diaphragm and then connected to the end surface of the piezoelectric body. When the vibrating diaphragm is thin, the vibrating diaphragm and the piezoelectric body are difficult to be directly connected and fixed. And through the needle-like contact of adopting rivet or riveting structure, then make the fixed connection that diaphragm and piezoelectricity can be better, then make the electric connection that diaphragm and piezoelectricity can be better, ensure electric conductive property.

Similarly, when an audio signal is inputted through the housing 7 and the connection terminal 9, and a voltage is inputted to the upper and lower surfaces of the piezoelectric cylinder 3 supported at the center, the piezoelectric cylinder 3 has a larger piezoelectric coefficient d33, when a voltage is applied in the axial direction (i.e., the direction perpendicular to the plane of the diaphragm), deformation is generated in the axial direction, the magnitude of the deformation is determined by the piezoelectric coefficient d33, and if the applied voltage is an alternating signal voltage, the deformation changes in accordance with the alternating signal voltage. Therefore, when the audio alternating voltage is used for acting, on one hand, the piezoelectric body can vibrate and sound, and simultaneously, the piezoelectric body acts on the diaphragm, so that the diaphragm is driven to vibrate and sound.

In summary, the embodiments of the present invention provide a receiver having a central piezoelectric body supporting a diaphragm. The telephone receiver can be simplified into two parts in structure: one is a diaphragm assembly with a central rigid support; the other is a central piezoelectric body for supporting the vibrating diaphragm, which is a columnar piezoelectric body with a fixed first end and a free second end. The shape of the diaphragm assembly can be, but is not limited to, circular, elliptical, square, rectangular, racetrack-type elliptical, and the like. The diaphragm may be peripherally fixed, but for flat panel systems, a diaphragm assembly with a central rigid support may also be peripherally free.

The telephone receiver provided by the embodiment of the invention has the following advantages:

1. the telephone receiver provided by the invention has the advantages of small power consumption and high efficiency, and also has the advantages of simple structure, convenient and easy manufacturing process, and convenience for further miniaturization.

2. When the telephone receiver provided by the invention is acted by audio alternating-current voltage, on one hand, the piezoelectric body vibrates to produce sound, and meanwhile, the piezoelectric body acts on the vibrating diaphragm, so that the vibrating diaphragm is driven to vibrate to produce sound. The piezoelectric body vibrates to produce sound, and the frequency response range is medium and high, and the low-frequency characteristic is poor; the low-frequency part of the frequency response characteristic of the driving diaphragm for vibrating and sounding is better; the combination of the two has complementary effect on frequency response, and realizes better sound production effect in low, medium and high full frequency bands.

The technical solution of the present invention is explained in detail by the specific embodiments above. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; the technical solutions described in the above embodiments can be modified or part of the technical features can be equivalently replaced by those skilled in the art; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and the scope of the technical solutions of the embodiments of the present invention.