CN105665265A

CN105665265A - Piezoelectric vibrator

Info

Publication number: CN105665265A
Application number: CN201610156215.1A
Authority: CN
Inventors: 李孟昭; 李伟; 俞胜平
Original assignee: Kunshan Liantao Electronics Co Ltd
Current assignee: Kunshan Liantao Electronics Co Ltd
Priority date: 2016-03-18
Filing date: 2016-03-18
Publication date: 2016-06-15

Abstract

The invention relates to a piezoelectric vibrator which comprises an upper enclosure, a lower enclosure, a mass block, a metal substrate, two circular piezoelectric plates and a pin. The mass block, the substrate and the piezoelectric plates are fixed together through the pin. The upper enclosure is downwards assembled on the lower enclosure, an accommodating space is defined by the upper enclosure and the lower enclosure, and the mass block, the metal substrate, the piezoelectric plates and the pin are all accommodated in the accommodating space. The two piezoelectric plates are attached to the upper face and the lower face of the substrate. The periphery of the substrate is clamped and fixed by the upper enclosure and the lower enclosure. The mass block is fixed below the substrate and the piezoelectric plates. The piezoelectric plates and the mass block are suspended in the accommodating space. The piezoelectric vibrator has good symmetrical balance and large vibration quantity, and is simple in structure and low in cost.

Description

Piezoelectric vibrator

Technical field

The present invention relates to a kind of piezoelectric vibrator, particularly relate to the piezoelectric vibrator of a kind of piezoelectricity sheet with inverse electrical effect.

Background technology

Electronic equipment set manufacturer, particularly portable electric appts manufacturers, always in the experience constantly improving user. Traditional equipment use vision and the sense of hearing provide feedback for user, such as video playback and audio frequency broadcasting etc. In some equipment, motion feedback (such as active force and resistance feedback) and tactile feedback (such as vibration, heat energy) can be supplied to the stronger experience of user. Specifically, the haptic effect of vibrating effect, vibrating tactile is providing real feedback to cause the impression of the sense organ inside simulation or virtual environment, as the blast effectiveness inside game machine can cause the strong vibration of user equipment, water droplet then can cause less vibration, the demand that this kind is experienced, is constantly heated.

Tactile feedback is being integrated in mobile phone, individual's equipment such as palm PC, portable game machine, such as some portable game machines can give user the effect to vibrate on control stick, in addition, individual's palm PC can also utilize the mode of vibration to carry out the operations such as schedule alarm.

Piezoelectric vibrator is as the main element providing tactile feedback, and its structure is also applied by improvement gradually with it. The piezoelectric vibrator of correlation technique, it quality block comprising substrate, being placed in the piezoelectric ceramics sheet on substrate two sides and be pasted onto on piezoelectricity sheet. Along with the progress of science and technology, human consumer pursues easy to carry and has more the ultrathin electronic product of aesthetic feeling, and this just requires that the electronic devices and components in product will more slimming, miniaturization.

Summary of the invention

It is an object of the invention to provide a kind of piezoelectric vibrator with preferably symmetrical balance and higher vibratory magnitude.

For realizing aforementioned object, the present invention adopts following technical scheme: a kind of piezoelectric vibrator, it comprises a circular upper machine shell, one circular lower machine shell, one quality block, one metal substrate, two circular piezoelectric sheets and a pin, described pin is by quality block, substrate and piezoelectricity sheet are fixed together, described upper machine shell is assembled on lower machine shell downwards, both surround a collecting space, described quality block, metal substrate, piezoelectricity sheet and pin are contained in this collecting space jointly, described two piezoelectricity sheets are attached to the top and bottom of substrate, described substrate periphery is gripped by upper machine shell and lower machine shell, described quality block is fixed on substrate and the lower section of piezoelectricity sheet, described piezoelectricity sheet and quality block are suspended on collecting space respectively.

Piezoelectric vibrator of the present invention there is preferably symmetrical balance and higher vibratory magnitude, in addition, the number of elements of piezoelectric vibrator is few, and structure is simple, and cost is low.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view of piezoelectric vibrator of the present invention.

Fig. 2 is the three-dimensional exploded view of piezoelectric vibrator of the present invention.

Fig. 3 is the sectional view of piezoelectric vibrator of the present invention in central position.

Embodiment

Referring to shown in Fig. 1 to Fig. 3, piezoelectric vibrator 100 of the present invention is flat circle, and it comprises machine shell 10 on, once machine shell 20, quality block 30, metal substrate 40, two circular piezoelectric sheet 50, pin 60 and some enameled wires 70.

Upper machine shell 10 is respectively plastic material injection moulding with lower machine shell 20, upper machine shell 10 is assembled on lower machine shell 10 downwards, and adopt ultra-sonic welded, hot melt adhesive or epoxy glue water cure, both are surrounded by a collecting space 25 jointly, and quality block 30, metal substrate 40, piezoelectricity sheet 50 and pin 60 are contained in this collecting space 25 jointly.

The annular upper side wall 12 that upper machine shell 10 comprises roof 11 and protrudes out downwards from roof 11 periphery, the annular lower wall 22 that lower machine shell 20 comprises the diapire 21 relative with roof 11 and upwards protrudes out from diapire 21 periphery, roof 11 is provided with the circular hole 15 run through up and down, upper side wall 12 and lower wall 22 are docking together, and joint is provided with the some protuberances 13 and breach 23 that cooperatively interact and the perforate 16 run through with collecting space 25. Lower wall 22 inside top is also provided with an annular recesses 25.

Quality block 30 is set to round pie, and central part is protruding upward, and one first fixed orifices 35 runs through the central part of quality block 30, and quality block 30 is suspended in collecting space 25, and separates between upper machine shell 10, lower machine shell 20.

Substrate 40 has the outwardly afterbody 42 in circular body portion 41 and main body 41 side being contained in collecting space 25, is arranged in perforate 16. Central authorities of main body portion 41 are provided with one the 2nd fixed orifices 45 run through up and down, and the periphery in main body portion 41 is contained in the annular recesses 24 of lower machine shell 20, are supported on lower machine shell 20 downwards, are moved up by upper side wall 22 restriction above connecing shell 10 simultaneously.

Piezoelectricity sheet 50 has inverse piezoelectric effect, i.e. generator tool distortion under extra electric field effect. Piezoelectricity sheet 50 is made up of the piezoelectric with piezoelectric effect characteristic, and piezoelectric generally comprises piezoquartz, piezoelectric ceramics, organic polymer piezoelectric. Two piezoelectricity sheets 50 are attached to substrate 40 main body portion 41 upper and lower surface respectively, and the area of piezoelectricity sheet 50 is less than piezoelectricity sheet 50 central authorities of substrate 40 main body portion 41, two and is provided with one the 3rd fixed orifices 55 run through up and down.

Pin 60 is arranged in first, second, third fixed orifices 35,45,55 downwards, quality block 30, substrate 40, piezoelectricity sheet 50 are fixed together, for increasing constant intensity and reduce height, present embodiment also uses laser welding process, and pin 60 head surrounding and quality block 30 weld together.

Each enameled wire 70 one end is welded on substrate 40, piezoelectricity sheet 50, and the other end extends piezoelectric vibrator 100, in order to connect outside power supply, powers to piezoelectric vibrator 100. Utilize enameled wire 70, be conducive to reduction to take space.

Piezoelectric vibrator 100 quality block 30 of the present invention, substrate 40, piezoelectricity sheet 50 adopt circle, improve symmetrical balance, it is to increase vibratory magnitude, and the number of elements of piezoelectric vibrator 100 is few in addition, and structure is simple, and cost is low.

Although being example object, disclose the preferred embodiment of the present invention, but the those of ordinary skill of this area is it will be appreciated that when not departing from the scope and spirit by the present invention disclosed in appending claims, various improvement, increase and replacement are possible.

Claims

1. a piezoelectric vibrator, it comprises a circular upper machine shell, one circular lower machine shell, one quality block, one metal substrate, two circular piezoelectric sheets and a pin, described pin is by quality block, substrate and piezoelectricity sheet are fixed together, described upper machine shell is assembled on lower machine shell downwards, both surround a collecting space, described quality block, metal substrate, piezoelectricity sheet and pin are contained in this collecting space jointly, described two piezoelectricity sheets are attached to the top and bottom of substrate, it is characterized in that: described substrate periphery is gripped by upper machine shell and lower machine shell, described quality block is fixed on substrate and the lower section of piezoelectricity sheet, described piezoelectricity sheet and quality block are suspended on collecting space respectively.

2. piezoelectric vibrator according to claim 1, it is characterised in that: described piezoelectric vibrator also comprises some enameled wires, and one end of enameled wire is welded on substrate, piezoelectricity sheet, and the other end extends machine shell.

3. piezoelectric vibrator according to claim 1, it is characterised in that: described quality block is set to round pie, and central part is protruding upward, presses on piezoelectricity sheet.

4. piezoelectric vibrator according to claim 1, it is characterized in that: the inner side at described lower machine shell top is provided with an annular recesses, the periphery of described substrate is contained in this groove, is moved up by the restriction of upper machine shell simultaneously, and described upper machine shell and lower machine shell are respectively plastic material injection moulding.

5. piezoelectric vibrator according to claim 1, it is characterized in that: the annular upper side wall that described upper machine shell comprises roof and protrudes out downwards from roof periphery, the annular lower wall that lower machine shell comprises the diapire relative with roof and upwards protrudes out from diapire periphery, described upper side wall and lower wall are docking together

Piezoelectric vibrator according to claim 5, it is characterised in that: described roof is provided with the circular hole run through up and down.

6. piezoelectric vibrator according to claim 5, it is characterised in that: the position that described upper side wall and lower wall connect is provided with the some protuberances and breach that cooperatively interact.

7. piezoelectric vibrator according to claim 5, it is characterized in that: the position that described upper side wall and lower wall connect is provided with and the perforate accommodated space and run through, described substrate comprises substrate to be had and is positioned at the outwardly afterbody in the collecting circular body portion in space and main body side, described main body portion periphery is gripped by upper side wall and lower wall, and described afterbody is arranged in this perforate.

8. piezoelectric vibrator according to claim 8, it is characterised in that: described piezoelectricity sheet is circular, and area is less than the area in main body portion.

9. piezoelectric vibrator according to claim 1, it is characterised in that: described quality block, substrate and piezoelectricity sheet are respectively equipped with for the fixed orifices that pin passes, and pin head surrounding is together with quality block laser welding.