CN201134921Y - Loud speaker - Google Patents

Abstract

A loudspeaker is formed by a vibrating system, a magnetic circuit system and an auxiliary system, wherein the vibrating system comprises a voice coil, a centering suspension and a complex basin, the magnetic circuit system comprises a second magnet, a concentrating flux plate and a first magnet, and the auxiliary system comprises a basin holder, a washer, a large lead wire and a patch bay. The loudspeaker is characterized in that the lower side of the second magnet is adhered with the upper side of the concentrating flux plate, the lower side of the concentrating flux plate is adhered with the upper side of the first magnet, thereby forming the whole magnetic circuit system which is assembled in the voice coil, the coil position center of the voice coil should be in a horizontal axial line with the center of the concentrating flux plate, a round positioning table which is sunk is arranged on the bottom of the perpendicular axis line of the basin holder, the inner diameter of the positioning table is matched with the outer diameter of the first magnet, the lower side of the first magnet is adhered with the upper side of the positioning table, and the basin holder and the positioning table are integrated. The loudspeaker has the overall dimension phi120mm, the height <=25mm, the largest output power 25W, and the sensitivity >=90dB, therefore the loudspeaker has excellent frequency response, especially has prominent low frequency response, which is suitable to be used on panel TV sets and ultra-thin type sound boxes.

Description

A kind of loud speaker

Affiliated technical field

The utility model belongs to a kind of loud speaker, relates in particular to a kind of loud speaker of using for panel TV set or ultrathin audio amplifier.

Background technology

The design of modern panel TV set or ultrathin audio amplifier, give the height of loud speaker headspace extremely narrow, no matter conventional loudspeakers all can not meet the demands in structure and electroacoustic performance, its defective is that the volume of loud speaker is big, Heavy Weight, width is wide, be difficult to accomplish in the space that requires, the realization maximum power is 25W, specified sensitivity level 〉=90 ± 2dB, frequency range is 60～10KHZ, 120 millimeters of overall dimension Φ, high≤indexs such as 25 millimeters, therefore loud speaker must be broken through the traditional design theory, improve its technology content, now be analyzed as follows: the compound basin height of conventional loudspeakers must be descended significantly, its difficulty is to make angle of circumference to become big, begin to cause the distortion of paper awl from low-frequency range, produce axial symmetry and cut apart vibration, harmonic distortion is strengthened, paper tang portion is different with middle part radiative acoustic wave phase place, make the pressure frequency response curve produce big Feng Hegu, it is poor to frequency response to cause paper to have a meagre knowledge of, and shows: (1) frequency range narrows down, unevenness increases, and sensitivity reduces; (2) cause also that simultaneously loudspeaker simple tone is bad, the serious variation of tonequality, and the compound basin operating frequency of existing loud speaker two ends very easily produce cuts apart vibration, is reduced, in sum in the compound basin life-span, improve the loud speaker traditional design, requiring of adaptation information age is imperative.

Summary of the invention

Development purpose of the present utility model is to provide a kind of a kind of loud speaker that is specially adapted to panel TV set or ultrathin audio amplifier, monnolithic case is of a size of 120 millimeters of Φ, overall height is≤25 millimeters, and acoustic performance meets national standard fully, solved that the conventional loudspeakers volume is big, Heavy Weight, highly thick present situation, break through the conventional speaker limit, reduce resonance frequency, solved the loud speaker height and reduced the electroacoustic performance that brings, the difficult problem that tonequality degenerates significantly.

The utility model is realized by following step: see accompanying drawing 1,2, it is made up of vibration, magnetic circuit and auxiliary system, and vibrational system comprises voice coil loudspeaker voice coil, centring disk, compound basin; Magnetic circuit system comprises magnet two, magnetic conductive board, magnet one; Auxiliary system comprises basin frame, packing ring, big lead-in wire, patch bay, it is characterized in that: magnet two is following and bonding above the magnetic conductive board, top bonding below the magnetic conductive board with magnet one, its magnetic circuit is assemblied in the voice coil loudspeaker voice coil, and the center of the coil position of voice coil loudspeaker voice coil should with the center of magnetic conductive board on same horizontal axis; Have circular recessed positioning table in basin frame vertical axis bottom, its internal diameter matches with magnet one external diameter, and magnet one is following and bonding above the positioning table.

Basin frame and positioning table are one.

Advantage of the present utility model and good effect: the magnetic circuit system of (one) this loud speaker does not adopt traditional magnetic conductor bowl, with the plate-column structure form, but directly a magnetic conductive board will be accompanied in the middle of two reversed polarity magnets, bonding back total height has only 14 millimeters, and be assemblied among the voice coil loudspeaker voice coil, greatly reduced the height of loud speaker; (2) because the innovative design of magnetic structure, adopt two magnets that magnetic circuit is repelled mutually in the centre position formation transverse magnetic line of force, its magnetic flux density is strengthened greatly, guarantee sensitivity 〉=90dB, because of thermal diffusivity good, the loud speaker maximum power of making can reach 25w, and especially low frequency characteristic is good, and frequency range is that conventional loudspeakers is incomparable under same material, volume from 60～10KHz; (3) the described compound basin of this loud speaker is made up of ring and vibrating diaphragm, its vibrating diaphragm height is low, the vibrating diaphragm cone is with two exponential form transition, the employing composite material has the modulus of elasticity height, density is little, damping good, can effectively suppress to cut apart vibration, also increased simultaneously paper awl inner body rigidity, and good frequency response and consistency are arranged, price is relatively cheap; (4) because magnetic circuit system is contained in the voice coil loudspeaker voice coil and the very shallow compound basin of design, just determined basin frame height to reduce greatly, and bonding magnetic circuit system above the positioning table in the basin frame, height≤25 millimeter of loud speaker have been guaranteed, and every electroacoustic performance meets in the national standard fully to be stipulated, is a kind of loud speaker that is specially adapted to panel TV set or ultrathin audio amplifier.

Description of drawings

Fig. 1 is a utility model assembling schematic diagram: wherein 1 is patch bay for big lead-in wire, 10 for packing ring, 9 for basin frame, 8 for magnet two, 7 for magnetic conductive board, 6 for magnet one, 5 for centring disk, 3 compound basins, 4 for voice coil loudspeaker voice coil, 2;

Fig. 2 is the utility model speaker frame front view: wherein A is a positioning table;

Fig. 3 is the utility model magnetic circuit system assembling schematic diagram: wherein 6 is that magnet two, 5 is that magnetic conductive board, 4 is magnet one.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further, (1) sees that accompanying drawing 1,2 is in the whole assembling process of loud speaker, should guarantee that basin frame (7) vertical axis bottom has circular recessed positioning table (A), the positioning table degree of depth is 2 millimeters, its center is with compound basin (3), voice coil loudspeaker voice coil (1), whole magnetic circuit system should be concentric, to guarantee the vibrational system operate as normal; (2) described compound basin 3 is made up of cone vibrating diaphragm and ring, vibrating diaphragm should adopt the composite diaphragm material, comprising adding wool and carbon fiber in the paper material to improve tonequality, to guarantee electroacoustic performance, characteristics with the papery vibrating diaphragm are raw material abundance, easy processing, low price, do not need expensive mould, mechanical performance is scalable in very wide effective range, can obtain good bandwidth and level and smooth response simultaneously, can match in excellence or beauty with the high-tech material fully; , the ring in (three) compound basin (3) should adopt the rubber material, it is better to have a good damping, compliance, fatigue durability; (4) remove big lead-in wire (9) need soldering to connect and patch bay (10) riveted joint outside, other part is bonding.

Claims (2)

1, a kind of loud speaker, it is made up of vibration, magnetic circuit and auxiliary system, and vibrational system comprises voice coil loudspeaker voice coil (1), centring disk (2), compound basin (3); Magnetic circuit system comprises magnet two (6), magnetic conductive board (5), magnet one (4); Auxiliary system comprises basin frame (7), packing ring (8), big lead-in wire (9), patch bay (10), it is characterized in that: top bonding below the magnet two (6) with magnetic conductive board (5), top bonding below the magnetic conductive board (5) with magnet one (4), its magnetic circuit is assemblied in the voice coil loudspeaker voice coil (1), and the center of the coil position of voice coil loudspeaker voice coil (1) should with the center of magnetic conductive board (5) on same horizontal axis; Have circular recessed positioning table (A) in basin frame (7) vertical axis bottom, its internal diameter matches with magnet one (4) external diameter, and bonding above the following and positioning table (A) of magnet one (4).

2, according to the described a kind of loud speaker of claim 1, it is characterized in that: basin frame (7) is an one with positioning table (A).

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