CN212544050U

CN212544050U - Loudspeaker device

Info

Publication number: CN212544050U
Application number: CN202021838522.6U
Authority: CN
Inventors: 丛子杰
Original assignee: Suzhou Qimeng Crystal Material Product Co ltd
Current assignee: Suzhou Qimeng Crystal Material Product Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-02-12
Anticipated expiration: 2030-08-28

Abstract

The embodiment of the utility model discloses speaker device, a serial communication port, include: at least one transducer; a flexible sound conducting part which is a mechanical vibration conducting layer; wherein, at least one transducer through adapting unit with flexible sound guide part is connected, so that flexible sound guide part output sound signal, the utility model discloses a speaker device can effectively avoid the hard speaker uncomfortable condition of using next to the shin of hard speaker.

Description

Loudspeaker device

Technical Field

The embodiment of the utility model provides a relate to the electroacoustic conversion field, especially relate to a loudspeaker device.

Background

The nature of sound is mechanical vibration, and acoustic signals can be viewed as a wave phenomenon, which is a dilatational wave generated by the displacement of media particles parallel to the direction of energy. A loudspeaker is a transducer that converts electrical signals into acoustic signals, i.e. a device that converts acoustic signals into mechanical vibrations.

Conventional speakers all have hard, difficult to bend parts, such as electromagnetic speakers and piezoelectric speakers; although the core of the transducer of the electrostatic speaker is a flexible membrane, the membrane is usually fixed on a rigid frame, and the finished product can still be regarded as rigid. Rigid speakers have limited application in body-fitting scenarios, such as use on wearable devices or while sleeping, where they can cause discomfort to the user.

Disclosure of Invention

The embodiment of the utility model provides a loudspeaker device can solve the stereoplasm speaker and use uncomfortable problem under the scene of laminating health.

In a first aspect, 1, a speaker device, comprising:

at least one transducer;

a flexible sound conducting part which is a mechanical vibration conducting layer;

wherein at least one transducer is connected with the flexible sound guiding part through a connecting part so as to enable the flexible sound guiding part to output sound signals.

Further, the transducer is an eccentric rotating mass transducer comprising:

the eccentric mass balance weight is matched with the DC motor and the eccentric mass balance weight;

wherein the eccentric mass weight is electrically connected to the DC motor through an armature shaft.

Further, the connecting part is a rivet, and the flexible sound guide part comprises a cotton cloth layer and a polyethylene layer.

Further, the transducer is a piezoelectric transducer, comprising:

the piezoelectric ceramic chip comprises a shell with a bottom wall, and a first electrode layer, a second electrode layer and a piezoelectric ceramic chip which are assembled in the shell;

the piezoelectric ceramic plate is coupled between the first electrode layer and the second electrode layer.

Further, the transducer is a linear transducer comprising:

the voice coil is assembled in the shell and comprises a shell with a bottom wall, and a compression spring, a permanent magnet and a voice coil which are assembled in the shell;

one end of the compression spring is fixedly connected to the first inner wall of the shell, and the other end of the compression spring is fixedly connected to the permanent magnet; the voice coil is fixedly connected to the second inner wall of the shell and is coaxially sleeved on the outer side of the permanent magnet.

Further, the connecting member includes any one of: a snap-fit connecting component, a glue-fit connecting component and a magnetic connecting component.

Further, the device further comprises: an acoustic signal receiving terminal and an acoustic signal processing section;

one end of the sound signal receiving terminal is fixed on the outer wall of the transducer shell, and the other end of the sound signal receiving terminal is electrically connected with the sound signal processing component.

Further, the acoustic signal processing section includes: a signal processor and a digital-to-analog converter;

one end of the signal processor receives a sound signal, and the other end of the signal processor is electrically connected with one end of the digital-to-analog converter;

the other end of the digital-to-analog converter is electrically connected with the acoustic signal receiving terminal.

Further, the acoustic signal processing section further includes: an amplifier;

one end of the amplifier is electrically connected with the other end of the digital-to-analog converter; the other end of the amplifier is electrically connected to the acoustic signal receiving terminal.

Further, the acoustic signal processing section further includes: a wireless receiver electrically connected with the signal processor.

Further, the signal processor includes any one of: digital signal processor, central processing unit, microcontroller, field programmable gate array and special chip.

The embodiment of the utility model provides a loudspeaker device, including at least one transducer; a flexible sound conducting part which is a mechanical vibration conducting layer; at least one transducer is connected with the flexible sound guide component through a connecting component, so that the flexible sound guide component outputs sound signals, and the uncomfortable situation caused by the fact that the hard loudspeaker is used next to the skin can be effectively avoided.

Drawings

Fig. 1A is a schematic structural diagram of a speaker device according to a first embodiment of the present invention;

fig. 1B is a schematic diagram of a speaker device according to an embodiment of the present invention;

fig. 2 is a sectional view taken along a-a of a speaker device according to an embodiment of the present invention;

fig. 3 is a schematic view of an operating principle of an eccentric mass actuator according to an embodiment of the present invention;

fig. 4 is a schematic diagram of three transducers provided by an embodiment of the present invention;

fig. 5 is a schematic diagram of three connecting components provided in an embodiment of the present invention;

fig. 6A is a frequency response graph of an eccentric mass transducer according to an embodiment of the present invention, showing a frequency response of 100Hz to 11500 Hz;

fig. 6B is a schematic structural diagram of another speaker device according to a second embodiment of the present invention;

fig. 6C is a schematic structural diagram of another speaker device according to a second embodiment of the present invention;

fig. 6D is a schematic structural diagram of another speaker device according to the second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a preferred speaker device according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a speaker device according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms used in the embodiments of the present invention and the claims should not be considered as exclusive unless explicitly stated or clearly indicated by the context, for example: the terms "a" and "an" do not denote the singular, but rather include the plural; the terms "comprises" and "comprising" merely indicate that elements (steps, elements, etc.) specified in the description are not exclusive of other elements; "based on" merely indicates that the prior art is explicitly referred to in this specification, and does not exclude other art having the same efficacy, i.e., it should be understood that "based at least in part on". Also, the use of the words "for example" and "such as" in the embodiments and the claims of the present invention merely indicates that the embodiments and the claims of the present invention clearly indicate the examples, and are not exclusive.

The conventional speaker can be roughly classified into an electromagnetic type, a piezoelectric type and an electrostatic type according to a driving method. The piezoelectric type loudspeaker is poor in low-frequency corresponding capability and is mainly used for products such as alarms and the like; the electrostatic speaker is a new speaker technology appearing in recent years, and the manufacturing cost is higher at present; the electromagnetic loudspeaker has mature technology and low manufacturing cost, and is widely applied to consumer products, military and industrial fields. However, the existing three types of speakers are hard speakers, which causes discomfort for users.

The "flexible speaker" described in the embodiments of the present invention is, as in the claims, an apparatus for converting an analog sound signal into mechanical vibration, and transmitting the mechanical vibration signal to the human ear through the flexible sound guide member and then through the air. The term "loudspeaker" refers to a transducer that converts an electrical signal into a mechanical vibration, i.e. an acoustic signal, and the term "loudspeaker" may also be replaced by the same term, such as "earphone", "horn", "player", etc. The term "flexible" is used in the scope of the embodiments and claims to refer to the property of an object that can be deformed under relatively low applied force, as opposed to the property of being "rigid" or "stiff". Furthermore, the term "flexible" as used in the embodiments and claims of the present invention means that the object has flexibility and/or elasticity, such as cotton cloth and polyethylene film, which are flexible, i.e. easily deformed by force, and have the characteristic of not being able to recover its shape before force is applied after the force for deforming the object is lost; meanwhile, the cotton cloth and the polyethylene film also have certain elasticity, namely, the cotton cloth and the polyethylene film restore the characteristic of the shape before being stressed after the deformation force is lost. Other terms will be further elaborated upon when mentioned below.

Example one

Fig. 1A is a schematic structural diagram of a speaker device according to an embodiment of the present invention, the speaker device specifically includes:

at least one transducer 110, a connecting member 120, and a flexible sound guiding member 130;

wherein the flexible sound guide member is a mechanical vibration conducting layer;

wherein at least one transducer 110 is connected with the flexible sound guiding member 130 through a connecting member 120, so that the flexible sound guiding member 130 outputs sound signals.

Fig. 1B is an exemplary speaker device according to an embodiment of the present invention. Wherein 101 is a flexible sound guide component and 102 is a transducer; transducer 102 receives an analog acoustic signal through the Audio Input terminal, Power being the Power supply.

Fig. 2 is a cross-sectional view of an exemplary speaker apparatus (i.e., speaker a-a in fig. 1B) according to an embodiment of the present invention. Wherein 101 is a flexible sound guide, 101.1 is a cotton layer, 101.2 is a low density polyethylene layer, 102 is a transducer, 201 is a connecting member, 202 is an eccentric mass actuator and 203 is an eccentric mass weight.

Specifically, the flexible sound guiding member 101 and the transducer 102 are connected by the connecting member 201, and after receiving the sound signal, the transducer 102 transmits the sound signal to the flexible sound guiding member 101 through the connecting member 201, and then the flexible sound guiding member 101 outputs the sound signal.

In an embodiment, the generating components of the sound source and the power supply labeled in fig. 1B and fig. 2 may be packaged outside the speaker device provided in this embodiment. For example, the generating means of the sound source and the power supply may be connected to the transducer by wires, or by wireless technology, in particular for example sound source signals such as Bluetooth (Bluetooth), Near-Field Communication (Near-Field Communication), Frequency modulated signals (Frequency Modulation), power supplies such as the wireless power Qi standard, etc. to the transducer. In another embodiment, the sound source and power generating components may also be packaged in the same housing as the transducer.

Further, the embodiment of the present invention provides a transducer which is an eccentric rotating mass transducer, including: the eccentric mass balance weight is matched with the DC motor and the eccentric mass balance weight; wherein the eccentric mass counterweight is electrically connected to the dc motor by an armature shaft: the eccentric mass balance weight is matched with the DC motor and the eccentric mass balance weight; wherein the eccentric mass weight is electrically connected to the DC motor through an armature shaft.

Specifically, in the embodiment of the present invention, the transducer may be an eccentric rotating mass transducer (ERM, also called "eccentric rotating mass motor", "eccentric vibration motor", "eccentric mass motor", etc.), hereinafter referred to as ERM. Referring to fig. 2, the ERM is comprised of a dc motor 202 and an eccentric mass weight 203, the eccentric mass weight 203 being attached to the armature shaft of the dc motor 202. As is well known, the analog acoustic signal is an alternating current electrical signal, that is, an electrical signal in which both the current intensity and the current direction change periodically; it is also known that when the polarity of the dc motor 202 is changed, the direction of rotation of the motor is changed accordingly. Referring to fig. 3, when the analog acoustic signal is connected to the ERM, the dc motor changes its direction of rotation as the polarity of the signal changes, and the motor drives the weight to change the center of gravity of the ERM, thereby generating mechanical vibration (acoustic signal). The mechanical vibration is transmitted to the flexible sound guiding member 101 through the connecting member 201 and received by the user.

Further, the connecting member 201 in the embodiment of the present invention is a rivet. The flexible sound-guiding member 101 is formed by laminating a cotton layer 101.1 and a Low Density Polyethylene (LDPE) layer.

It should be noted that, in addition to the ERM, other transducers capable of converting analog acoustic signals into mechanical vibrations may also be applied to the present embodiment. Fig. 4 is a schematic diagram of three transducers provided by an embodiment of the present invention, in which 401 is an eccentric rotating mass transducer, 402 is a piezoelectric material transducer, and 403 is a linear vibration transducer.

Further, the embodiment of the present invention provides a transducer that is a piezoelectric transducer (i.e. piezoelectric material transducer 402), including: a shell with a bottom wall, and a first electrode layer 402.1, a second electrode layer 402.3 and a piezoceramic sheet 402.2 assembled in the shell; wherein the piezoceramic sheet 402.2 is coupled between the first electrode layer 402.1 and the second electrode layer 402.3.

Specifically, the piezoelectric material transducer 402 according to the embodiment of the present invention refers to a transducer that generates mechanical vibration by using piezoelectric effect, the first electrode layer 402.1 and the second electrode layer 402.3 are electrodes, and the piezoelectric ceramic plate 402.2 may be a set of piezoelectric ceramic plates. According to the principle of inverse piezoelectric effect, the piezoelectric material is deformed when an electric field is applied and restores its original shape after the applied electric field disappears, and the direction of the deformation is related to the polarity of the electric field, so that an analog electric signal can be converted into mechanical vibration.

Further, the present invention provides a transducer which is a linear (vibration) transducer, including: a shell with a bottom wall, and a compression spring 403.2, a permanent magnet 403.1 and a voice coil 403.3 (voice coil) assembled in the shell; one end of the compression spring 403.2 is fixedly connected to the first inner wall of the housing, and the other end of the compression spring 403.2 is fixedly connected to the permanent magnet 403.1; the voice coil 403.3 is fixedly connected to the second inner wall of the casing and coaxially sleeved outside the permanent magnet 403.1.

Specifically, the linear transducer 403 provided by the embodiment of the present invention is another available transducer solution: a linear actuator (also known as a "linear resonant actuator", "voice coil motor", or "linear vibration motor"). When current passes through the voice coil, the current interacts with the magnetic field of the permanent magnet to generate a force vector perpendicular to the current direction, and then the permanent magnet is pushed, and the direction of the force vector is determined by the current direction, so that the analog sound signal can drive the linear vibration actuator to reciprocate to generate mechanical vibration.

Further, the utility model discloses the adapting unit that the embodiment provided includes following arbitrary one: a snap-fit connecting component, a glue-fit connecting component and a magnetic connecting component.

It should be noted that the connecting member may be a connecting member 203 as illustrated in fig. 2, fixed on the transducer and the flexible sound guiding member, or may be detachable. As shown in fig. 5, fig. 5 is a schematic view of three connecting components provided in an embodiment of the present invention, wherein: 501 is a snap-fit connection component; 502 is a glued connecting component; 503 is a magnetic connecting member.

Specifically, the snap-fit connection member 501 includes: the snap button 501.1 and the snap slot 501.2, the connecting component connects the transducer and the flexible sound conducting component by mechanical force, for example, the upper surface of the snap button 501.1 is fixedly connected with the transducer, and the flexible sound conducting component is installed on the snap slot 501.2 and is connected with the snap button 501.1; in the glued joint 502, a chemical glue material 502.1 is included, and the specific glue material is selected according to the specific materials of the transducer and the flexible sound guide part; the magnetic connecting member 503 includes a first permanent magnet 503.1 and a second permanent magnet 503.2, the first permanent magnet 503.1 can be directly connected to the transducer housing, and the connecting member connects the transducer and the flexible sound guiding member by magnetic force.

Optionally, the flexible sound guiding component may be made of any material suitable for the specific application, including but not limited to: cotton, hemp and other textiles, leather, polyethylene, polypropylene, polyvinyl chloride, vinyl acetate, various papers, metal meshes, silica gel, natural rubber, and the like. The flexible sound guide member may be formed by compounding a plurality of materials other than the single material. For example, the composite material may be formed by stacking a plurality of layers of simple substance materials, or may be formed by blending a plurality of materials.

Example two

In the above embodiments, the unprocessed analog acoustic signal may be directly coupled to the transducer, but in some specific application scenarios, some processing of the acoustic signal may improve the quality of the output sound. For example, the above embodiments employ an ERM as the transducer, and any transducer that converts an analog acoustic signal to a mechanical vibration signal will produce a different mechanical vibration intensity (sound pressure) for acoustic signals of different frequencies, referred to in the art as a "frequency response". Specifically, for example, as shown in fig. 6A, in the speaker device provided in the above-described embodiment, the ERM transducer is used to generate low sound pressures for frequencies around 1100Hz, 5500Hz, and 6500Hz, and to generate high sound pressures for frequencies around 2000Hz, 3000Hz, 6000Hz, and 8000 Hz. But in a different scenario the user needs to increase or decrease the sound pressure at a certain frequency. Therefore, the embodiment of the present invention provides a speaker device, which further includes: an acoustic signal receiving terminal and an acoustic signal processing section.

As shown in fig. 6B, fig. 6B is a schematic structural diagram of another speaker device provided by the second embodiment of the present invention, including: transducer 610, connection component 620, flexible sound guide 630, acoustic signal receiving terminal 640, and acoustic signal processing component 650. One end of the acoustic signal receiving terminal 640 is fixed to an outer wall of the housing of the transducer 610, and the other end of the acoustic signal receiving terminal 640 is electrically connected to the acoustic signal processing part 650.

Further, as shown in fig. 6C, the acoustic signal processing part 650 includes: a signal processor 6501 and a digital-to-analog converter 6502; one end of the signal processor 6501 receives a sound signal, and the other end of the signal processor 6501 is electrically connected with one end of the digital-to-analog converter 6502; the other end of the digital-to-analog converter 6502 is electrically connected to the acoustic signal receiving terminal 640.

Further, as shown in fig. 6D, the acoustic signal processing section further includes: an amplifier 6503; one end of the amplifier 6503 is electrically connected with the other end of the digital-to-analog converter 6502; the other end of the amplifier 6503 is electrically connected to the acoustic signal receiving terminal 640.

Illustratively, as shown in fig. 7, the signal processor is illustrated as a digital signal processor. Fig. 7 is a schematic structural diagram of a preferred speaker apparatus according to the second embodiment of the present invention, which includes a digital signal processor 701, a digital-to-analog converter 702, and an amplifier 703.

Specifically, embodiments of the present invention add a Digital Signal processor 701 between the transducer and the Digital acoustic Signal (Digital Audio Signal). The digital Signal processing 701 performs processing such as Equalization (Equalization), Low-Pass filtering (Low-Pass Filter), High-Pass filtering (High-Pass Filter), Band-Pass filtering (Band-Pass Filter), etc. on the acoustic Signal, outputs an Analog acoustic Signal (Analog Audio Signal) through a digital-to-Analog converter 702 (DAC), and outputs the Analog acoustic Signal to the transducer through an amplifier 703 to be converted into a mechanical vibration Signal.

The embodiment of the utility model provides a through adding acoustic signal receiving terminal and sound signal processing part, can carry out optimization to the acoustic signal that the transducer was received for flexible sound guide part transmits high-quality acoustic signal, accepts the poor condition of sound quality with the improvement user.

EXAMPLE III

On the basis of the above embodiment, the embodiment of the present invention provides an acoustic signal processing unit in speaker device, further comprising: a wireless receiver electrically connected with the signal processor.

Fig. 8 is a schematic structural diagram of another speaker device according to a third embodiment of the present invention, including: a transducer 810, a connecting part 820, a flexible sound guiding part 830, an acoustic signal receiving terminal 840, an acoustic signal processing part 850, a signal processor 8501, a digital-to-analog converter 8502, and a wireless receiver 8503. The wireless receiver 8503 is electrically connected to the signal processor 8501.

In some scenarios, the digital sound signal needs to be transmitted wirelessly, and devices such as portable music players, smart phones, personal computers, etc. have the capability to transmit the digital sound signal to a receiver using the Bluetooth (r) protocol. Therefore, on the basis of the second embodiment, the present embodiment further adds a digital acoustic signal for receiving the digital acoustic signal transmitted by the bluetooth protocol, and transmits the digital acoustic signal to the digital acoustic signal processing component (DSP) mentioned in the second embodiment, and further converts the digital acoustic signal into an analog acoustic signal and transmits the analog acoustic signal to the transducer.

It should be noted that the bluetooth transmission protocol is used in this embodiment only as an exemplary use case, and other wireless transmission protocols such as wireless network (WiFi), ZigBee, low power wide area network (LoRa), etc. may also be used as the protocol for wireless transmission.

The embodiment of the utility model provides a through adding wireless receiver, can accept the sound signal of multiple route.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A speaker apparatus, comprising:

at least one transducer;

2. The apparatus of claim 1, wherein the transducer is an eccentric rotating mass transducer comprising:

3. The device of claim 2, wherein the connecting member is a rivet and the flexible sound guide member comprises a cotton layer and a polyethylene layer.

4. The apparatus of claim 1, wherein the transducer is a piezoelectric transducer comprising:

5. The apparatus of claim 1, wherein the transducer is a linear transducer comprising:

6. The device of any of claims 1-2 or 4-5, wherein the connecting member comprises any of: a snap-fit connecting component, a glue-fit connecting component and a magnetic connecting component.

7. The apparatus of any of claims 1-5, further comprising: an acoustic signal receiving terminal and an acoustic signal processing section;

8. The apparatus of claim 7, wherein the acoustic signal processing component comprises: a signal processor and a digital-to-analog converter;

9. The apparatus of claim 8, wherein the acoustic signal processing component further comprises: an amplifier;

10. The apparatus of claim 8 or 9, wherein the acoustic signal processing component further comprises: a wireless receiver electrically connected with the signal processor.

11. The apparatus of claim 8 or 9, wherein the signal processor comprises any one of: digital signal processor, central processing unit, microcontroller, field programmable gate array and special chip.