CN2539372Y

CN2539372Y - High-pitch loudspeaker

Info

Publication number: CN2539372Y
Application number: CN 02214442
Authority: CN
Inventors: 刘潮彦
Original assignee: HUATAI ELECTRICAL APPLIANCE FACTORY PENGLAI CITY
Current assignee: Huatai Electrical Appliance Factory, Penglai City
Priority date: 2002-04-27
Filing date: 2002-04-27
Publication date: 2003-03-05
Anticipated expiration: 2012-04-27

Abstract

The utility model discloses a high voice loudspeaker, comprising a case, a panel, a protective screen, a vibrated diaphragm, an acoustical material, a magnet, a yoke iron and a impedance converter, which is characterized in that the impedance converter is arranged at the lower part of the inner of the case, the yoke iron is arranged above the impedance converter, the magnet and the enhanced magnet are separately fixed at two inner sides of the head of the yoke iron, the acoustical material is arranged in the yoke iron, the vibrated diaphragm is fixed at two ends of the secondary coil of the impedance converter through the clearance of the magnet, a gap is arranged on the vibrated diaphragm, and a triangle shaped fold is pressed on the vibrated diaphragm. The utility model has the advantages of wide amplitude-frequency range, less distortion, good vertical directivity, long service life and simple structure.

Description

A kind of high pitch loudspeaker

One, technical field:

The utility model belongs to the loudspeaker techniques field, especially relates to a kind of aluminium band type high pitch loudspeaker.

Two, background technology:

Present loud speaker, especially high pitch loudspeaker has multiple, resemble common ball top, awl benzvalene form high pitch loudspeaker, its working method is to do linear reciprocating motion by the voice coil loudspeaker voice coil promotion vibrating diaphragm or the basin that shakes, under this working method, the suitable attitude of loud speaker is poor, the narrower high frequency limit of amplitude-frequency scope is low, thereby the resolution of loud speaker is lower, big dynamic distortion is bigger, wait drawback greatly in the variation of effective frequency range internal impedance, limited the playback of music detail, its key technical index can not satisfy music-lover's needs, though occurred several aluminium band type high pitch loudspeakers now, but because the restriction of structure, leakage field is more serious, the vibrating diaphragm root ruptures easily, and the many structures of member are complicated, because of the longer vertical directivity of its vibrating diaphragm relatively poor, 10KHz decay 8-10dB in the time of vertical 30 °, high-end distortion is bigger, and between 2-7%, the upper frequency limit of source of sound SACD has reached 100KHz now in the distortion more than the 6500Hz, it is existing that ribbon loudspeaker is high-end can only reach 30KHz-40KHz, though have reach 100KHz its low frequency extends poorly again, low frequency can only arrive 5000Hz, thereby existing loud speaker can not be satisfied the demand.

Three, summary of the invention:

The purpose of this utility model be to improve the deficiency of prior art and a kind of amplitude-frequency wide ranges is provided, distortion is few, vertical directivity good, long service life, high pitch loudspeaker simple in structure.

The purpose of this utility model is to realize like this, a kind of high pitch loudspeaker, be by housing, panel, protection network, vibrating diaphragm, sound-absorbing material, magnet, yoke and impedance transformer are formed, be characterized in that the bottom in housing is provided with impedance transformer, be provided with yoke above the impedance transformer, head two inboards of yoke respectively are fixed with a magnet, respectively be provided with one below two magnet and strengthen magnet, strengthen between the magnet, strengthen between magnet and the yoke and be filled with sound-absorbing material, vibrating diaphragm passes the magnet gap and is fixed on impedance transformer secondary coil two ends, and vibrating diaphragm is provided with a slit and vibrating diaphragm is pressed the triangle gauffer.

In order further to realize the purpose of this utility model, the length that can be vibrating diaphragm is between 20-40mm, and width is between 15-30mm, and thickness is between 0.005-0.02mm, and the width in vibrating diaphragm slit is between 0.2-1mm.

In order further to realize the purpose of this utility model, can also be that the elementary winding of impedance transformer is by at least two bursts of enamelled wire coilings.

Compared with the prior art the utility model has following distinguishing feature and good effect: the bottom in housing is provided with impedance transformer; be provided with yoke above the impedance transformer; head two inboards of yoke respectively are fixed with a magnet and strengthen magnet; vibrating diaphragm is placed in the magnetic gap of four blocks of magnet and yoke composition; strengthen magnet puts together magnetic flux as far as possible; guaranteed in big magnetic gap, to produce sufficiently high magnetic flux density; vibrating diaphragm is provided with a slit and vibrating diaphragm is pressed the triangle gauffer; pressurized uniformity before and after when having guaranteed the vibrating diaphragm vibrations like this; reduced distortion; distortion is lower than 0.5% in effective frequency range; shorten vibrating diaphragm length and improved vertical directivity; 10KHz decay 3-4dB in the time of vertical 30 °; respectively be provided with one below two magnet in yoke and strengthen magnet; make strong vibrating diaphragm middle part, magnetic field, magnetic gap middle part stressed relatively large; protected the connecting portion of vibrating diaphragm; prolonged the life-span; the elementary winding of impedance transformer is by at least two bursts of enamelled wire coilings; increased the surface area of lead; reduced the influence of high frequency surface action and high frequency induction reactance; improved high frequency characteristics; amplitude-frequency very flatly extends to 100KHz from 1700Hz; reduced the intermediate link that connects; reduced and be connected resistance and induction reactance between transformer and the vibrating diaphragm, guaranteed the playback of high-frequency signal.

Four, description of drawings:

Below in conjunction with drawings and Examples a kind of high pitch loudspeaker of the utility model is described in further details.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is the decomposing schematic representation of the utility model structure.

Five, specific embodiments:

Embodiment 1, a kind of high pitch loudspeaker, with reference to Fig. 1, Fig. 2, opening part at housing 1 is coated with panel 2, the middle part of panel 2 is provided with protection network 3, bottom in the housing 1 is provided with impedance transformer 8, the elementary winding of impedance transformer 8 adopts at least two bursts of enamelled wire coilings, use the coiling of stereotyped writing enamelled wire in the present embodiment, impedance transformer 8 elementary winding two ends are connected with binding post on the housing 1, be provided with yoke 7 above the impedance transformer 8, head two inboards of yoke 7 respectively are fixed with a magnet 6, respectively be provided with one below two magnet 6 in yoke 7 and strengthen magnet 9, strengthen between the magnet 9, strengthen between magnet 9 and the yoke 7 by sound-absorbing material 5 intervals, vibrating diaphragm 4 is fixed on the two ends of 8 levels of blocked impedance converter in the magnetic gap, vibrating diaphragm 4 is provided with a slit 10 and vibrating diaphragm 4 is pressed the triangle gauffer, gap in the housing 1 adopts colloid to fill, the length of vibrating diaphragm 4 can be between 20-40mm, width is between 15-30mm, thickness is between 0.005-0.02mm, the width in vibrating diaphragm slit 10 is between 0.2-1mm, the effective long 32mm that is of vibrating diaphragm in the present embodiment, wide is 19.5mm, thickness is 0.01mm, the width in slit 10 is 0.8mm, and this has constituted a kind of static structure of the present utility model.

Embodiment 2, and a kind of high pitch loudspeaker is on the basis of embodiment 1, the elementary winding of impedance transformer 8 adopts two bursts of enamelled wire coilings, and the length of vibrating diaphragm 4 is 40mm, and width is 23mm, thickness is 0.008mm, and the width in slit 10 is 0.2mm, and other are identical with embodiment 1.

When using the utility model, with two binding post places in circuit of the present utility model, operation principle of the present utility model is that a strip metal vibrating diaphragm 4 is placed magnetic field, the tone currents vibrating diaphragm 4 of directly flowing through, make vibrating diaphragm 4 vibration soundings, since of the present utility model instigate the part be exactly oscillating component, system has only several milligrams of weights, thereby has reduced the inertia of vibrational system, improves transient response, the D.C. resistance of vibrating diaphragm 4 is very little to have only 0.01-0.02 Ω, vibrating diaphragm 4 directly is connected with impedance transformer 8 simultaneously, has reduced intermediate link, has reduced resistance and induction reactance, less in the variation of effective frequency range internal impedance, guaranteed the reproduction of ultra-high frequency signal.

Claims

1, a kind of high pitch loudspeaker, be by housing (1), panel (2), protection network (3), vibrating diaphragm (4), sound-absorbing material (5), magnet (6), yoke (7) and impedance transformer (8) are formed, it is characterized in that the bottom in housing (1) is provided with impedance transformer (8), be provided with yoke (7) above the impedance transformer (8), head two inboards of yoke (7) respectively are fixed with a magnet (6), respectively be provided with one below two magnet (6) and strengthen magnet (9), strengthen between the magnet (9), strengthen between magnet (9) and the yoke (7) and be filled with sound-absorbing material (5), vibrating diaphragm (4) passes magnet (6) gap and is fixed on impedance transformer (8) secondary coil two ends, and vibrating diaphragm (4) is provided with a slit (10) and vibrating diaphragm (4) is pressed the triangle gauffer.

2, a kind of high pitch loudspeaker according to claim 1, the length that it is characterized in that vibrating diaphragm (4) are between 20-40mm, and width is between 15-30mm, and thickness is between 0.005-0.02mm, and the width of vibrating diaphragm slit (10) is between 0.2-1mm.

3, a kind of high pitch loudspeaker according to claim 1 is characterized in that the elementary winding of described impedance transformer (8) is by at least two bursts of enamelled wire coilings.