CN203675311U

CN203675311U - Flat sounding device

Info

Publication number: CN203675311U
Application number: CN201320668810.5U
Authority: CN
Inventors: 王洪兴; 周荣冠; 毛路斌
Original assignee: ACC Acoustic Technologies Shenzhen Co Ltd
Current assignee: ACC Acoustic Technologies Shenzhen Co Ltd
Priority date: 2013-10-28
Filing date: 2013-10-28
Publication date: 2014-06-25
Anticipated expiration: 2023-10-28

Abstract

The utility model provides a flat sounding device. The flat sounding device comprises a cover plate having a through hole, a vibration plate received by and fixed in the through hole, and a piezoelectric vibrator for driving the vibration plate. The piezoelectric vibrator is arranged above the vibration plate, and provided with two terminal parts in the long axis direction. The two terminal parts are fixed to the cover plate, and the long axis direction of the piezoelectric vibrator coincides with that of the cover plate. The flat sounding device is applicable to various types of electronic equipment, and is not only easy in application, but also low in cost.

Description

Dull and stereotyped sound-producing device

[technical field]

The utility model relates to vibration sounding field, relates in particular to a kind of dull and stereotyped sound-producing device.

[background technology]

Along with the arrival in mobile Internet epoch, the quantity of Intelligent mobile equipment constantly rises.And among numerous mobile devices, mobile phone is common, the most portable mobile terminal device beyond doubt.At present, the function of mobile phone and various, one of them is the music function of high-quality, and loud speaker in mobile phone is one of necessary requirement realizing this high-quality music function.Current mobile phone on the market, generally adopt minisize electromagnetic loud speaker to realize the playing function of music, but the product structure complexity of this kind of structure, and take interior of mobile phone space, need certain height because of minisize electromagnetic loud speaker self simultaneously, thereby seriously limited the slimming development of the mobile terminals such as mobile phone.

Along with the development of social science and technology, utilize the mobile phone of dull and stereotyped vocal skill to start to occur, but this mobile phone is all generally the display screen sounding that utilizes mobile phone, because the material of mobile phone screen is more single, general is all frangible glass material, thickness can not arbitrarily regulate, cause the tonequality of the sound that screen sends to be difficult to promote, simultaneously, this technology is applied on screen to also more complicated, piezoelectric vibrator and screen need to be fixed, in the time of assembling, easily damage glass screen, cause the significantly raising of production cost, therefore restricted the development of current dull and stereotyped vocal skill.

So need to provide a kind of novel dull and stereotyped sound-producing device in order to address the above problem.

[utility model content]

The purpose of this utility model is to provide a kind of dull and stereotyped sound-producing device, and it has solved existing dull and stereotyped vocal skill and has utilized display screen to do oscillating plate, causes assembling difficulty, the high problem of the frangible production cost causing of glass screen.

A kind of dull and stereotyped sound-producing device, it comprise have through hole cover plate, accommodate the piezoelectric vibrator that is fixed on the oscillating plate in through hole and drives described oscillating plate, described piezoelectric vibrator is fixed on cover plate across two ends on described oscillating plate setting and its long axis direction, and the long axis direction of described piezoelectric vibrator is consistent with the long axis direction of cover plate.

Preferably, two boss are extended in the position of two ends of the corresponding piezoelectric vibrator of described cover plate, and the end of described piezoelectric vibrator is fixed on described boss.

Preferably, described piezoelectric vibrator comprises sheet metal and the piezoelectric patches being sticked thereon, is provided with for the fixed part of fixing metal sheet with around the insulation division of described fixed part on described boss.

Preferably, on described boss, be provided with the first groove to lower recess, in described the first groove, accommodate the insulation division that is fixed with plastic material, on described insulation division, be provided with the second groove to lower recess, in described the second groove, accommodate the fixed part that is fixed with metal material, described fixed part surface is provided with draw-in groove, and described sheet metal is fastened in this draw-in groove.

Preferably, described oscillating plate is provided with the driving section connecting to piezoelectric vibrator direction projection and with piezoelectric vibrator.

Preferably, on described oscillating plate, be also provided with to piezoelectric vibrator direction projection some limiting sections.

Preferably, described limiting section is positioned at respectively four jiaos of places and the center of oscillating plate.

Preferably, described limiting section is provided with padded coaming.

The utility model provides a kind of dull and stereotyped sound-producing device, and it can be applied in various electronic equipments, not only easily application, and also application cost is cheap.

[brief description of the drawings]

Fig. 1 is the exploded view that the utility model embodiment applies the cell phone rear cover of dull and stereotyped sound-producing device;

Fig. 2 is the combination schematic diagram of cell phone rear cover shown in Fig. 1.

[embodiment]

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the utility model, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.

As depicted in figs. 1 and 2, a kind of dull and stereotyped sound-producing device, comprise piezoelectric vibrator 2 and the oscillating plate 3 of cover plate 1, strip, cover plate 1 has two long limits and two minor faces, in the present embodiment, cover plate 1 and the common composition cell phone rear cover of oscillating plate 3, in selectable other execution modes, also can be used as a part for cell phone rear cover.

Described cover plate 1 is provided with through hole 10, described dull and stereotyped sound-producing device also comprises and is contained in described through hole 10 and can be driven with vibrative oscillating plate 3 and connector 4 for being connected described oscillating plate 3 and cover plate 1 by described piezoelectric vibrator 2, the vertical described oscillating plate 3 of direction of vibration of described piezoelectric vibrator 2, described piezoelectric vibrator 2 is positioned at described oscillating plate top, it is provided with two ends on long axis direction, cover plate 1 is fixed in described two ends, and described cover plate 1 is around described oscillating plate 3.

Boss 11 is extended in the position of two ends 20 of the corresponding piezoelectric vibrator 2 of described cover plate 1, on this boss 11, be provided with the first groove 110 to lower recess, in the first groove 110, accommodate the insulation division 12 that is fixed with plastic material, on this insulation division 12, be also provided with the second groove 120 to lower recess, in this second groove 120, accommodate the fixed part 13 that is fixed with metal material, these fixed part 13 surfaces are provided with draw-in groove 130, for the piezoelectric vibrator 2 that is fixed.Because cover plate 1 itself adopts the metal materials such as aluminium matter, the setting of insulation division 12, can effectively prevent the situation that cell phone rear cover is charged, certainly, this is preferably embodiment of one of the utility model, in selectable other execution modes, insulation division 12, fixed part 13 and boss 11 also can otherwise combine, as long as be surrounded with insulation facility around fixed part 13, by the isolation of insulating of fixed part 13 and cover plate 1, can implement.

Described piezoelectric vibrator 2 also comprises sheet metal 20 and is attached at the piezoelectric patches 21 that the piezoelectric ceramic on sheet metal 20 is made, described sheet metal 20 piezoelectric patches 21 that both can both sides be all sticked, also only a side is provided with piezoelectric patches 21, in the present embodiment, is the both sides piezoelectric patches that has all been sticked.In the present embodiment, this cell phone rear cover has two piezoelectric vibrators 2 parallel and separated by a distance, and its long axis direction is consistent with the long axis direction of cover plate 1.Vertical with cover plate 1 long axis direction with respect to classic flat-plate sound-producing device, the sound-producing device of this kind of design, when bonnet is arc, also can not exert an influence to the placement of piezoelectric patches, and therefore installation and use is convenient.

Certainly, this is only a kind of execution mode wherein, and in fact, the quantity of piezoelectric vibrator 2 is not limited to this, and its fixed-direction also can be consistent with the short-axis direction of cover plate 1, also can implement.Described boss 11 is provided with groove 110, and the end of described sheet metal 20 is fastened in described draw-in groove 130, and is welded and fixed with fixed part 13.

On oscillating plate 3, be also provided with the some limiting sections 31 outstanding to interior of mobile phone direction, this limiting section 31 can the downward displacement of constrained vibration plate, thereby prevents tearing of connector 4 and tearing of piezoelectric patches 54.At the correspondence position of interior of mobile phone, guide vane end stop (not shown) can be set, thereby jointly play the effect of constrained vibration plate 3 displacements, because the largest deformation amount of connector 4 and piezoelectric patches 21 can not exceed 0.3mm, therefore, interval between limiting section 31 and guide vane end stop is no more than 0.3mm, more excellent, in any one of the guide vane end stop in limiting section 31 or the mobile phone of dull and stereotyped sound-producing device, being provided with one deck padded coaming, this padded coaming can be foam or rubber.In the present embodiment, be provided with altogether 5 limiting sections 31, lay respectively at four jiaos and middle position of oscillating plate 3, can make like this mean forced of oscillating plate, certainly, in optional other execution modes, the number of boss can be also other, position also can be different, as long as can play the effect of constrained vibration plate displacement, can implement.

On oscillating plate 3, be also provided with to piezoelectric vibrator 2 directions and extend and be connected to the driving section 32 on piezoelectric vibrator 2, piezoelectric vibrator 2 drives the vibration sounding of oscillating plate 3 by this driving section.

The dull and stereotyped sound-producing device that the utility model provides, it not only can be applied on cell phone rear cover, can also be applied in other various electronic equipments, because the sheathing material material unlike glass display screen as cell phone rear cover and so on is single frangible, it can adopt different materials to make bonnet as required, especially the dull and stereotyped sound-producing device that the utility model provides, oscillating plate 3 is for vibration, oscillating plate 3 arranges with cover plate 1 interval, therefore, in fact only need to change oscillating plate 3 and just can regulate the tonequality of sent sound, therefore, the dull and stereotyped sound-producing device that the utility model provides is not only easily employed, and application cost is cheap.

Above-described is only preferred embodiments of the present utility model; it should be pointed out that for the person of ordinary skill of the art at this, do not departing under the prerequisite of the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.

Claims

1. a dull and stereotyped sound-producing device, it comprise have through hole cover plate, accommodate the piezoelectric vibrator that is fixed on the oscillating plate in through hole and drives described oscillating plate, it is characterized in that: described piezoelectric vibrator is positioned at the top of described oscillating plate, it is provided with two ends on long axis direction, cover plate is fixed in described two ends, and the long axis direction of described piezoelectric vibrator is consistent with the long axis direction of cover plate.

2. dull and stereotyped sound-producing device according to claim 1, is characterized in that: two boss are extended in the position of two ends of the corresponding piezoelectric vibrator of described cover plate, and the end of described piezoelectric vibrator is fixed on described boss.

3. dull and stereotyped sound-producing device according to claim 2, is characterized in that: described piezoelectric vibrator comprises sheet metal and the piezoelectric patches being sticked thereon, is provided with for the fixed part of fixing metal sheet with around the insulation division of described fixed part on described boss.

4. dull and stereotyped sound-producing device according to claim 3, it is characterized in that: on described boss, be provided with the first groove to lower recess, in described the first groove, accommodate the insulation division that is fixed with plastic material, on described insulation division, be provided with the second groove to lower recess, in described the second groove, accommodate the fixed part that is fixed with metal material, described fixed part surface is provided with draw-in groove, and described sheet metal is fastened in this draw-in groove.

5. dull and stereotyped sound-producing device according to claim 4, is characterized in that: described oscillating plate is provided with the driving section connecting to piezoelectric vibrator direction projection and with piezoelectric vibrator.

6. dull and stereotyped sound-producing device according to claim 5, is characterized in that: on described oscillating plate, be also provided with to piezoelectric vibrator direction projection some limiting sections.

7. dull and stereotyped sound-producing device according to claim 6, is characterized in that: described limiting section is positioned at respectively four jiaos of places and the center of oscillating plate.

8. dull and stereotyped sound-producing device according to claim 7, is characterized in that: described limiting section is provided with padded coaming.