CN206042362U - Electroacoustic subassembly of big dB value of piezoelectricity low frequency and use its piezoelectric loudspeaker - Google Patents

Abstract

The utility model discloses an electroacoustic subassembly of big dB value of piezoelectricity low frequency and use its piezoelectric loudspeaker belongs to piezoelectricity sound -generating device field. The utility model discloses an electroacoustic subassembly of the big dB value of piezoelectricity low frequency, include that fixed ring organizes with the at least a set of buzzing piece of installing on solid fixed ring admittedly, the piezoelectric buzzer who all includes two mutual parallel arrangement is organized to every buzzing piece of organizing, have certain clearance between two piezoelectric buzzer, and two piezoelectric buzzer's vibration phase place is the same, and the vibration phase place that every group buzzing piece was organized is also the same, the resonant frequency and the compliance of electroacoustic subassembly can be adjusted in clearance between two piezoelectric buzzer in organizing through regulation buzzing piece. The utility model also discloses a piezoelectric loudspeaker of using above -mentioned electroacoustic subassembly. The utility model discloses utilize ordinary piezoelectric buzzer can satisfy low frequency, big dB value requirement simultaneously, cooperate suitable resonant cavity can reach american UL464 standard requirements.

Description

A kind of electroacoustic component and the piezoelectric loudspeaker using which of the big dB values of piezoelectricity low frequency

Technical field

This utility model is related to a kind of electroacoustic component and the loudspeaker using which, more particularly, it relates to a kind of piezoelectricity low frequency The electroacoustic component and the piezoelectric loudspeaker using which of big dB values.

Background technology

Piezoelectric ceramics piezo is a kind of device of piezoelectric ceramic piece application, due to human ear to the audio signal of 3KHz the most Sensitivity, so generally design the resonant frequency of piezo in 3KHz or so during production.Piezoelectric ceramics piezo has sensitivity The advantages of high, low, good stability, high-low temperature resistant, life-span length of consuming energy, now have been widely used and be matched in electronic watch, automobile loudspeaker , sound equipment, communication, remote sensing, computer, in the product such as electronic toy.

In the alarm industry for aspects such as fire alarms, UL464 standards in the U.S. require that the frequency of alarm is low Frequency range (520Hz or so scopes), additional conditions are that input power is the smaller the better, and measuring distance is 3m, and (nothing adds sound press requirement 85dB Power test), and product 520Hz pure tones require (resonance point F3, F5, F7 at least -5dB), and best -20dB arrives -30dB.Due to pressure Electroceramics piece is typically all used for high-frequency element, if the frequency of 520Hz will be accomplished, ceramics need to be made very thin, theoretically may be used With what is accomplished, but in actual production, very thin ceramics are easy to breakage, it is virtually impossible to effectively produce, and yield rate is extremely low. Therefore, up to the present, can be with using also nobody on the alarm for meeting U.S.'s UL464 standards by piezoelectric ceramics piezo Accomplish, meet use requirement at present or using the loudspeaker of 2W～3W, energy consumption is very high.

In order to improve the LF-response of piezoelectric ceramics piezo, conventional means are using double diaphragm structures.Chinese patent Number ZL200820032820.9, authorized announcement date is on March 11st, 2009, and invention and created name is：Voltage current porcelain voice drives Device, this application case are related to a kind of generating device on the alarms such as fire-fighting, and which includes at least two-layer piezoelectric ceramic piece, pressure The radius of electroceramics piece is not less than 15mm, and thickness is not more than 0.15mm, and the upper and lower surface of every layer of piezoelectric ceramic piece is provided with conduction Cloth, is bonded by glue layer between piezoelectric ceramic piece and conductive fabric.This application case is using at least two-layer piezoelectric ceramic piece and conductive fabric group It is combined into voice driving device, although effectively reduce frequency, but due to the limitation of its structure design, still cannot meet simultaneously Low frequency, big dB values are required, therefore cannot really meet U.S.'s UL464 standards.

The content of the invention

1. utility model technical problem to be solved

The purpose of this utility model is to overcome existing piezoelectric ceramic piece and its component to be difficult to meet the big dB values sound of low frequency Require, cannot especially meet the deficiency of U.S. UL464 alarm standards, there is provided a kind of electroacoustic component of the big dB values of piezoelectricity low frequency and Using its piezoelectric loudspeaker, using the technical solution of the utility model, using Common piezoelectricity piezo can meet simultaneously low frequency, Big dB values require that the suitable resonant cavity of cooperation can reach the requirement of U.S.'s UL464 standards.

2. technical scheme

For reaching above-mentioned purpose, the technical scheme that this utility model is provided is：

A kind of electroacoustic component of the big dB values of piezoelectricity low frequency of the present utility model, including retainer ring and is installed in retainer ring Least one set piezo group, every group of piezo group include two piezoelectricity singing pieces arranged in parallel, two piezoelectric buzzings There is between piece certain interval, and the vibration phase of two piezoelectricity singing pieces is identical, the vibration phase of every group of piezo group also phase Together.

Further, electroacoustic group can be adjusted by adjusting the gap between two piezoelectricity singing pieces in piezo group The resonant frequency of part and pliable.

Further, the medial wall of described retainer ring is provided with boss, two in piezo group piezoelectricity singing piece The both sides of boss are relatively fixed to, the height of boss is the gap between two piezoelectricity singing pieces.

Further, described piezoelectricity singing piece is adhesively fixed on the boss of retainer ring.

A kind of piezoelectric loudspeaker of the present utility model, including resonant cavity, also including above-mentioned electroacoustic component, described electroacoustic group Part is installed on resonance intracavity by retainer ring.

3. beneficial effect

The technical scheme provided using this utility model, compared with existing known technology, with following remarkable result：

(1) the electroacoustic component and the piezoelectric loudspeaker using which of the big dB values of a kind of piezoelectricity low frequency of the present utility model, by Arranging least one set in retainer ring includes two piezo groups with certain interval and vibration phase identical piezoelectricity singing piece, Low frequency, big dB values can be met simultaneously using Common piezoelectricity piezo to require, coordinate suitable resonant cavity to can reach the U.S. The requirement of UL464 standards；

(2) the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency of the present utility model, which passes through to adjust two in piezo group Gap between individual piezoelectricity singing piece can adjust the resonant frequency of electroacoustic component and pliable, can meet the occasion of 20Hz～1KHz Use, have wide range of applications；

(3) the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency of the present utility model, the medial wall of its retainer ring is provided with convex Platform, two in piezo group piezoelectricity singing piece are relatively fixed to the both sides of boss, and the height of boss is two piezoelectric buzzings Gap between piece, piezoelectricity singing piece in retainer ring position and are fixed conveniently, and make simpler；

(4) a kind of piezoelectric loudspeaker using above-mentioned electroacoustic component of the present utility model, its electroacoustic component are pacified by retainer ring Loaded on resonance intracavity, the piezoelectric alarm produced has good bass effect with piezoelectric loudspeaker, has especially reached the U.S. UL464 standards, it is only necessary to which 0.5W power can replace the loudspeaker of existing 2W～3W, significantly reduce energy consumption, with good application Prospect.

Description of the drawings

Fig. 1 is a kind of structural representation of the electroacoustic component of the big dB values of piezoelectricity low frequency of the present utility model；

Fig. 2 is the partial enlargement structural representation at K in Fig. 1；

Fig. 3 is a kind of structural representation of piezoelectric loudspeaker using above-mentioned electroacoustic component of the present utility model.

Label declaration in schematic diagram：

1st, retainer ring；1-1, boss；2nd, piezoelectricity singing piece；3rd, resonant cavity.

Specific embodiment

For further appreciating that content of the present utility model, this utility model is described in detail with reference to accompanying drawing.

With reference to shown in Fig. 1, a kind of electroacoustic component of the big dB values of piezoelectricity low frequency of the present utility model, including retainer ring 1 and peace Loaded on the least one set piezo group in retainer ring 1, every group of piezo group includes two piezoelectric buzzings arranged in parallel Piece 2, has certain interval, and the vibration phase of two piezoelectricity singing pieces 2 is identical, every group of buzzing between two piezoelectricity singing pieces 2 The vibration phase of piece group is also identical.Electricity can be adjusted by adjusting the gap between two piezoelectricity singing pieces 2 in piezo group The resonant frequency of sound component and pliable.With reference to shown in Fig. 2, the medial wall of retainer ring 1 is provided with boss 1-1, in piezo group Two piezoelectricity singing pieces 2 are relatively fixed to the both sides of boss 1-1, and the height of boss 1-1 is between two piezoelectricity singing pieces 2 Gap；Piezoelectricity singing piece 2 is adhesively fixed on the boss 1-1 of retainer ring 1.A kind of big dB values of piezoelectricity low frequency of the present utility model Electroacoustic component, increases powerful theoretical and changes that sound system is pliable to reduce system resonance frequencies using piezoelectricity singing piece is electrically in parallel Electroacoustic it is theoretical, there is certain interval and vibration phase identical Common piezoelectricity piezo 2 by two, you can while meeting low Frequently, big dB values are required.When more high-power, more loud noise is needed, it is capable of achieving by the quantity for increasing piezo group.

With reference to shown in Fig. 3, a kind of piezoelectric loudspeaker of the present utility model, including resonant cavity 3 and above-mentioned electroacoustic component, electroacoustic Component is installed in resonant cavity 3 by retainer ring 1.The piezoelectric alarm produced has good bass effect with piezoelectric loudspeaker Really, U.S.'s UL464 standards have especially been reached, it is only necessary to which 0.5W power can replace the loudspeaker of existing 2W～3W, significantly reduce energy Consumption, has a good application prospect

With reference to embodiment, the utility model will be further described.

Embodiment

As a example by one group of piezo group is set.As shown in figure 1, a kind of electroacoustic group of the big dB values of piezoelectricity low frequency of the present embodiment Part, including a retainer ring 1 and one group of piezo group being installed in retainer ring 1, the piezo group includes that two are parallel to each other and set The piezoelectricity singing piece 2 put, has certain interval, by adjusting between two piezoelectricity singing pieces 2 between two piezoelectricity singing pieces 2 Gap can adjust the resonant frequency of electroacoustic component and pliable, and the vibration phase of two piezoelectricity singing pieces 2 is identical, two piezoelectricity Adopt between piezo 2 and be connected in parallel.Using the interaction of two piezoelectricity singing pieces 2 of vibration phase identical, electricity is increased The power of sound component, reduces resonant frequency, can meet low frequency, big dB values simultaneously using Common piezoelectricity piezo 2 and require, can The occasion for meeting 20Hz～1KHz is used, and is had wide range of applications.

As shown in Fig. 2 the medial wall of retainer ring 1 is provided with boss 1-1, two in piezo group piezoelectricity singing piece, 2 phase The both sides of boss 1-1 are fixed on over the ground, and the height of boss 1-1 is the gap between two piezoelectricity singing pieces 2；Specifically, piezoelectricity Piezo 2 is adhesively fixed on the boss 1-1 of retainer ring 1, and piezoelectricity singing piece 2 in retainer ring 1 is positioned and is fixed conveniently, and is made It is simpler.

In the occasion for needing more high-power, more loud noise, it is only necessary to by increasing paired piezo group, structure letter It is single, it is easy to make.

There is above-mentioned electroacoustic component, suitable cavity is combined using traditional approach, you can produce piezoelectric loudspeaker or pressure Electric alarms based on pattern recognition.As shown in figure 3, a kind of piezoelectric loudspeaker of the present embodiment, including resonant cavity 3 and above-mentioned electroacoustic component, electroacoustic group Part is installed in resonant cavity 3 by retainer ring 1.Experiment shows that the piezoelectric alarm produced has good with piezoelectric loudspeaker Bass effect, when the gap between two piezoelectricity singing pieces 2 is adjusted to suitable dimension, fullys meet U.S.'s UL464 standards, only Replace the loudspeaker of existing 2W～3W by needing 0.5W power, significantly reduce energy consumption, have a good application prospect.

A kind of electroacoustic component and the piezoelectric loudspeaker using which of the big dB values of piezoelectricity low frequency of the present utility model, by fixing Arranging least one set on ring includes two piezo groups with certain interval and vibration phase identical piezoelectricity singing piece, utilizes Common piezoelectricity piezo can meet low frequency, big dB values simultaneously and require, coordinate suitable resonant cavity to can reach U.S. UL464 marks Accurate requirement；Can apply to the occasion that any requirement piezoelectric ceramics makes 20Hz～1KHz bass devices.

Below schematically this utility model and embodiments thereof are described, the description does not have restricted, accompanying drawing Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area Those of ordinary skill enlightened by which, in the case where objective is created without departing from this utility model, without creatively designing The frame mode similar to the technical scheme and embodiment, all should belong to protection domain of the present utility model.

Claims (5)

1. the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency, it is characterised in that：Including retainer ring (1) and it is installed on retainer ring (1) On least one set piezo group, every group of piezo group include two piezoelectricity singing pieces (2) arranged in parallel, two pressures There is between electric piezo (2) certain interval, and the vibration phase of two piezoelectricity singing pieces (2) is identical, every group of piezo group Vibration phase is also identical.

2. the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency according to claim 1, it is characterised in that：By adjusting buzzing The gap between two piezoelectricity singing pieces (2) in piece group can adjust the resonant frequency of electroacoustic component and pliable.

3. the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency according to claim 1 and 2, it is characterised in that：Described consolidates The medial wall for determining ring (1) is provided with boss (1-1), and two in piezo group piezoelectricity singing piece (2) are relatively fixed to boss (1-1) both sides, the height of boss (1-1) are the gap between two piezoelectricity singing pieces (2).

4. the electroacoustic component of the big dB values of a kind of piezoelectricity low frequency according to claim 3, it is characterised in that：Described piezoelectricity honeybee Ring piece (2) is adhesively fixed on the boss (1-1) of retainer ring (1).

5. a kind of piezoelectric loudspeaker, including resonant cavity (3), it is characterised in that：Also include described in Claims 1-4 any one Electroacoustic component, described electroacoustic component are installed in resonant cavity (3) by retainer ring (1).