CN103745717B

CN103745717B - Double-driving buzzer

Info

Publication number: CN103745717B
Application number: CN201310714571.7A
Authority: CN
Inventors: 徐波; 徐金国; 吴逸飞; 杨欢
Original assignee: Handeli (Changzhou) Electronics Co Ltd
Current assignee: Handeli (Changzhou) Electronics Co Ltd
Priority date: 2013-12-20
Filing date: 2013-12-20
Publication date: 2016-08-17
Anticipated expiration: 2033-12-20
Also published as: CN103745717A

Abstract

The present invention relates to a kind of double-driving buzzer, including housing, the first ferrum core in housing, second ferrum core, first iron core is provided with wrapping post, second iron core is provided with lower wrapping post, upper wrapping post, it is respectively equipped with coil on lower wrapping post, first ferrum core, the vibrating diaphragm both separated it is provided with between second iron core, the first coupling cavity is formed between vibrating diaphragm and the first iron core, vibrating diaphragm is provided with magnet steel, the second coupling cavity it is provided with between first iron core and housing, first iron core offers through hole, housing offers the sound hole being connected with the second coupling cavity.The structure of the present invention, uses the magnet steel of smaller size smaller to be fixed in vibrating diaphragm and just can meet requirement, reduce production cost；The utilization of double coupled cavitys can largely increase frequency range, just can form two magnetic fields after two coil electricities, pushes away a gesture drawn with magnet steel formation one and makes vibrating diaphragm vibration work, makes up buzzer energy supply deficiency problem under not having the work of traditional permanent magnetic field.

Description

Double-driving buzzer

Technical field

The present invention relates to acoustical generator technical field, be specifically related to a kind of double-driving buzzer.

Background technology

Tradition buzzer is difficult to can have relatively high sound pressure on low frequency to high frequency, it is generally the case that volume Little buzzer is just typically only capable to, by high band operation, just seem helpless at low frequency, bulky honeybee Ring device is generally used in low-frequency range, has higher preferable bass effect, but does nothing at high frequency treatment, Thus the buzzer of existing structure can not meet the requirement of use, limited by being.To have by speaker The gesture of replacement, in order to make up this defect, we devise this double-driving buzzer.

Summary of the invention

For above-mentioned technical problem, the present invention provides a kind of reasonable in design, compact double-driving buzzer, It changes the structural principle of tradition buzzer, uses one to push away an operation principle drawn and makes it have higher than tradition honeybee Ring device performance, has wider frequency, and operation strategies is more wide.

Realize technical scheme as follows:

Double-driving buzzer, including housing, is horizontally arranged with the first iron core, the second iron core in housing, the The assembly space closed by arranging bracing frame to be formed between one iron core, the second iron core, in the first iron core surface Portion arranges the upper wrapping post that oriented second iron core direction extends, and the second iron core surface middle part arranges oriented first ferrum The lower wrapping post that core direction extends, described upper wrapping post, lower wrapping post be respectively arranged with coil, and described the The vibrating diaphragm both separated it is provided with, between vibrating diaphragm and the first iron core between one iron core, the second iron core Form the first coupling cavity, vibrating diaphragm be fixedly installed magnet steel, described magnet steel face wrapping post, The end of lower wrapping post, is provided with the second coupling cavity between described first iron core and housing, at the first iron core On offer for connecting the first coupling cavity, the through hole of the second coupling cavity, housing offers and the The sound hole that two coupling cavity are connected, and it is arranged in housing the wiring board for being electrically connected with coil.

Have employed such scheme, after connecting the signal of telecommunication, the audio signal that agitator produces is passed through coil, makes Coil produces magnetic field, and vibrating diaphragm constitutes vibrational system with magnet steel, under the interaction of two groups of coils and magnet steel Making periodic vibration sounding, the suction of one group of coil generation S pole during work, with the N of magnet steel in vibrational system The most attracting, and the coil of another group produces the suction of S pole, scolds with the S-phase of magnet steel in vibrational system, so Making vibrational system produce bigger amplitude, this measure not only compensate for buzzer is not having traditional permanent magnetic field to work Under energy supply deficiency problem, but also increase efficiency, the sound wave that vibrational system vibration produces is by direct projection chamber shadow Ringing, have preferable medium and low frequency performance, sound wave outwards diffuses through the first coupling cavity, is then passed through the first coupling Close cavity and enter the second coupling cavity, so under the dual coupling of two coupling cavity so that it is have Preferably high frequency performance, same sound wave is through the polymerization of twice coupled cavity, then sends to free found field through sound hole, Its acoustic pressure also can be higher.The structure of the present invention, it is only necessary to use the magnet steel of smaller size smaller to be fixed in vibrating diaphragm Just can meet requirement, it is possible to reduce the overall volume of buzzer, reduce production cost；As long as being two lines Just can form two magnetic fields after circle energising, push away a gesture drawn with magnet steel formation one and make vibrating diaphragm vibration work, Make up buzzer energy supply deficiency problem under not having the work of traditional permanent magnetic field.

Further, support frame as described above includes the first support of annular, the second support, the first support, The end face that two supports contact is provided with the clamping plane compressing vibrating diaphragm edge that cooperates, in pressure Being provided with projection on second support of tight plane side, the first support is provided with the groove inserted for projection, The opposite side of projection arranges the concave surface of oriented second rack sinking, described first support is provided with and joins with concave surface The convex surface closed.Such structure, it is ensured that the first support, the second support firmly clamp vibrating diaphragm, will not go out Now loosen phenomenon, also be able to the firm connection ensureing between the first support, the second support simultaneously.

Further, distance A between described upper wrapping post, lower wrapping post root to vibrating diaphragm is 2.8mm —3.2mm。

Further, described upper wrapping post, the front end face of lower wrapping post are plane, and it is to distance B of magnet steel For 0.4mm 0.43mm.So ensure that the magnetic field that coil produces has active adsorption or promotion to magnet steel Can, strengthen magnetic field function.

Further, described magnet steel is Nd-Fe-B magnet steel.

Further, described upper wrapping post, lower wrapping post, magnet steel center on the same line.So energy The magnet steel that enough coils ensureing generation produce is more effectively to magnet steel generation effect.

Accompanying drawing explanation

Fig. 1 is the structural representation of the present invention；

Detailed description of the invention

The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.

Seeing Fig. 1, double-driving buzzer, including open at one end, the housing 1 that one end is closed, horizontal stroke in housing To being provided with first iron core the 2, second iron core 3, by arranging bracing frame shape between the first iron core, the second iron core Becoming the assembly space 4 closed, the first iron core surface middle part arranges the upper wrapping post that oriented second iron core direction extends 5, the second iron core 3 surface middle part arrange oriented first iron core direction extend lower wrapping post 6, upper wrapping post, It is respectively arranged with coil 7 on lower wrapping post, in being embodied as, corresponding in order to ensure the magnetic field performance produced, First magnetic core, the second magnetic core and corresponding coil equivalently-sized, and upper wrapping post, lower wrapping post, magnet steel It is on same straight line.

The vibrating diaphragm 8 both separated, vibrating diaphragm and the first ferrum it is provided with between first iron core, the second iron core Form the first coupling cavity 9 between core, form direct projection chamber 10 between the second iron core and vibrating diaphragm, in vibrating diaphragm On be fixedly installed magnet steel 11, magnet steel is Nd-Fe-B magnet steel, and magnet steel faces wrapping post, lower wrapping post End, in being embodied as, upper wrapping post, lower wrapping post, magnet steel center on the same line, the first ferrum It is provided with the second coupling cavity 12 between core and housing, the first iron core offers for connection the first coupling Cavity, the through hole 13 of the second coupling cavity, this through hole is used for discharging sound, and its quantity, size are as required Set, housing offers the sound hole 14 being connected with the second coupling cavity, and is arranged at housing In for being electrically connected with the wiring board of coil, this wiring board includes the FPC being connected with the coil on upper wrapping post Wiring board 15, the PCB 16 being connected with lower wrapping post coil, FPC wiring board is with PCB even Connect, PCB is equipped with two connecting contact pins 17, it is simple to be connected with external circuit.

Wherein, bracing frame includes first support the 18, second support 19 of annular, the first support, second The end face that frame contacts is provided with the clamping plane 20 compressing vibrating diaphragm edge that cooperates, and is compressing Being provided with projection 21 on second support of plane side, the first support is provided with the groove inserted for projection 21 22, the opposite side at projection arranges the concave surface 23 of oriented second rack sinking, and the first support is provided with recessed The convex surface 24 that face coordinates, so ensure that clamping vibrating diaphragm, cannot be loosened after, also be able to simultaneously Ensure the firm connection between the first support, the second support；Upper wrapping post 5, lower wrapping post 6 root are to vibration Distance A between film 8 is 2.8mm or 3mm or 3.2mm.Upper wrapping post, the front end face of lower wrapping post are flat Face, it is 0.4mm or 0.42mm or 0.43mm to distance B of magnet steel.

The operation principle of the present invention: after connecting the signal of telecommunication, the audio signal that external oscillator produces is passed through line Circle, makes coil produce magnetic field, and vibrating diaphragm and magnet steel constitute vibrational system, mutual at two groups of coils and magnet steel Making periodic vibration sounding under effect, the suction of one group of coil generation S pole during work, with magnetic in vibrational system The N of steel is the most attracting, and the coil of another group produces the suction of S pole, scolds with the S-phase of magnet steel in vibrational system, So making vibrational system produce bigger amplitude, this measure not only compensate for buzzer is not having traditional permanent magnetic field Energy supply deficiency problem under Gong Zuo, but also increase efficiency, the sound wave that vibrational system vibration produces is by direct projection Chamber affects, and has preferable medium and low frequency performance, and sound wave outwards diffuses through the first coupling cavity, is then passed through the One coupling cavity enters the second coupling cavity, so under the dual coupling of two coupling cavity so that it is Having more preferable high frequency performance, same sound wave is through the polymerization of twice coupled cavity, then sends to freedom through sound hole Sound field, its acoustic pressure also can be higher.

The unit for electrical property parameters of this buzzer is as follows:

At resonant frequency 100Hz 1KHz；SPL≥80dB；

At resonant frequency 1.2KHz 1.7KHz；SPL≥90dB；

At resonant frequency 2KHz 3KHz；SPL≥80dB；

At resonant frequency 3KHz 4KHz；SPL≥90dB；Can be seen that the Performance comparision of this buzzer is steady Fixed.

It should be noted here that for the person of ordinary skill of the art, without departing from the invention structure On the premise of think of, it is also possible to make improvement, but these belong to protection scope of the present invention.

Claims

1. double-driving buzzer, it is characterised in that include housing, be horizontally arranged with in housing the first iron core, Second iron core, the assembly space closed by arranging bracing frame to be formed between the first iron core, the second iron core, the One iron core surface middle part arranges the upper wrapping post that oriented second iron core direction extends, and the second iron core surface middle part sets It is equipped with the lower wrapping post extended to the first iron core direction, described upper wrapping post, lower wrapping post are respectively arranged with Coil, is provided with the vibrating diaphragm both separated between described first iron core, the second iron core, vibrating diaphragm with Forming the first coupling cavity between first iron core, be fixedly installed magnet steel in vibrating diaphragm, described magnet steel is the most right Wrapping post, the end of lower wrapping post, between described first iron core and housing, be provided with the second coupling cavity, First iron core offer for connecting the first coupling cavity, the through hole of the second coupling cavity, on housing Offer the sound hole being connected with the second coupling cavity, and be arranged in housing for being electrically connected with coil Wiring board.

Double-driving buzzer the most according to claim 1, it is characterised in that support frame as described above includes circle First support of annular, the second support, the end face that the first support, the second support contact is provided with phase interworking Close the clamping plane that vibrating diaphragm edge is compressed, the second support of clamping plane side is provided with convex Block, the first support is provided with the groove inserted for projection, and the opposite side at projection is arranged under oriented second support Heavy concave surface, described first support is provided with the convex surface coordinated with concave surface.

Double-driving buzzer the most according to claim 1, it is characterised in that described upper wrapping post, under Wrapping post root is 2.8mm 3.2mm to distance A between vibrating diaphragm.

Double-driving buzzer the most according to claim 1, it is characterised in that described upper wrapping post, under The front end face of wrapping post is plane, and it is 0.4mm 0.43mm to distance B of magnet steel.

Double-driving buzzer the most according to claim 1, it is characterised in that described magnet steel is neodymium iron boron Magnet steel.

Double-driving buzzer the most according to claim 1, it is characterised in that described upper wrapping post, under Wrapping post, magnet steel center on the same line.