CN201440718U

CN201440718U - Yoke for improving magnetic force and loudspeaker using yoke

Info

Publication number: CN201440718U
Application number: CN2009201569264U
Authority: CN
Inventors: 李相镐; 金昌元; 都成焕; 权哲荣
Original assignee: BO SUNG ELECTRICS Co Ltd
Current assignee: BO SUNG ELECTRICS Co Ltd
Priority date: 2008-12-12
Filing date: 2009-06-09
Publication date: 2010-04-21
Anticipated expiration: 2019-06-09
Also published as: KR20100006313U; TWM384484U; WO2010067922A1

Abstract

The utility model relates to a yoke for improving the magnetic force and a loudspeaker using the yoke. The yoke comprises a U-shaped yoke body formed by arranging the side walls on the edges of a flat plate in a line shape in a protruding way and a metal ring bonded inside the ends of the side walls of the yoke body, so that high-density uniform magnetic force can be formed in the magnetic circuit formed by the plate and the yoke. The loudspeaker comprises a vibrating plate making sounds through vibration, a voice coil attached on the vibrating plate and positioned on the magnetic circuit to enable the vibrating plate to vibrate when current flows, a frame used for bearing the vibrating plate and provided with a installing space formed inside, the yoke installed in the installing space inside the frame and provided with the metal ring bonded inside the ends of the side walls, a magnet attached in the middle of the yoke, and the plate attached on the magnet to form the magnetic circuit with the yoke through the gap.

Description

Be used to the loud speaker that improves the yoke of magnetic force and use this yoke

Technical field

The utility model relates to loud speaker, specifically, relates to the loud speaker that is used to obtain the yoke of high density and uniform magnetic force and uses this yoke.

Background technology

Usually, loud speaker is following stereo set: by in plate and the magnetic circuit that magnet and yoke piece become, make the gap (Gap) of voice coil loudspeaker voice coil between plate and yoke attached to oscillating plate, when on voice coil loudspeaker voice coil, flowing the signal of telecommunication, be converted to kinetic energy at magnetic circuit, oscillating plate produces dilatational wave in air, thereby produces sound wave.

As shown in Figure 1, the existing Microspeaker 10 of use in portable type electronic products such as mobile phone is by constituting as lower member: oscillating plate 11, and it produces sound equipment by vibration; Voice coil loudspeaker voice coil 12, it when electric current flows, makes oscillating plate 11 vibrations attached on the oscillating plate 11; Framework 13, it supports oscillating plate 11; U type yoke 14, it is installed in the inboard of framework 13; Magnet 15, it is attached to the central authorities of U type yoke 14; Plate 16; And cover 17, when flowing the signal of telecommunication on the voice coil loudspeaker voice coil 12 in the gap (Gap) between yoke 14 and plate 16, oscillating plate 11 produces dilatational wave in air, thereby produces sound wave.

But as shown in Figure 1, use the existing U type yoke 14 in Microspeaker to have following problem: the side wall ends of yoke can only be manufactured into the yi word pattern structure, so the characteristic of magnetic circuit descends.

The utility model content

The utility model is researched and developed in order to address the above problem, the purpose of this utility model is to provide a kind of loud speaker yoke, the integrally formed to the inside projection of its side wall ends at yoke, perhaps jointing metal ring on the yi word pattern yoke is so that can obtain high density and magnetic field uniformly in the gap.

Another purpose of the present utility model is to provide a kind of loud speaker, and this loud speaker improves the yoke of structure by employing, thereby improves its characteristic.

In order to achieve the above object, the U type yoke main body that yoke of the present utility model is formed by the sidewall yi word pattern projection that makes dull and stereotyped edge constitutes with the becket of the inboard of the side wall ends that is bonded on above-mentioned yoke main body, thereby forms high density and uniform magnetic force in the magnetic circuit that can form between plate and yoke.

And in order to achieve the above object, loud speaker of the present utility model comprises: oscillating plate, and it produces sound equipment by vibration; Voice coil loudspeaker voice coil, it is attached to above-mentioned oscillating plate, and is arranged in magnetic circuit, makes above-mentioned vibration plate vibrates when electric current flows; Framework, it supports above-mentioned oscillating plate, and forms installing space in the inboard; Yoke, it is installed in the installing space of said frame inboard, in the interior side engagement of side wall ends becket is arranged; Magnet, it is attached to above-mentioned yoke central authorities; And plate, it is attached on the above-mentioned magnet, and forms magnetic circuit by gap and above-mentioned yoke.

According to loud speaker of the present utility model, side wall ends at yoke, integrally formed to the inside projection, perhaps form stopper protrusion in the inboard of yoke, becket is installed on the stopper protrusion or becket is bonded on the inboard of the yi word pattern side wall ends of yoke, thereby can obtain high density and uniform magnetic force by in plate and the gap that yoke piece becomes in the mode of forcing to fill in or weld.

Description of drawings

Fig. 1 is the skeleton diagram that shows existing loud speaker.

Fig. 2 is to use the joint stereogram of the loud speaker of yoke of the present utility model.

Fig. 3 is the figure that is used to illustrate the action of yoke of the present utility model.

Fig. 4 is another example of yoke of the present utility model.

Symbol description

110 oscillating plates; 120 voice coil loudspeaker voice coils; 130 frameworks; 140 yokes; The 140a stopper protrusion; 142 beckets; 150 magnet; 160 plates; 170 lids

Embodiment

Below, the technical task that further offers some clarification on the utility model and solve by preferred embodiment of the present utility model according to the utility model.The following examples only are used for illustrating the utility model, do not limit scope of the present utility model.

Fig. 2 is to use the joint stereogram of the loud speaker of yoke of the present utility model, and Fig. 3 is the figure that is used to illustrate the action of yoke of the present utility model.

As Fig. 2 and shown in Figure 3, yoke 140 of the present utility model is formed with stopper protrusion 140a in the inboard of its U type side wall ends, and becket 142 is installed on stopper protrusion 140a, perhaps mode jointing metal ring to force to fill in or weld, thus can obtain high density and magnetic force uniformly.As shown in Figure 2, at the loud speaker that has used above-mentioned yoke 140 of the present utility model by constituting as lower member: oscillating plate 110, sound equipment takes place by vibration in it; Voice coil loudspeaker voice coil 120, it is attached to above-mentioned oscillating plate 110, and is arranged in magnetic circuit, makes oscillating plate 110 vibrations when electric current flows; Framework 130, it supports above-mentioned oscillating plate 110; Yoke 140, it is installed in the installing space of framework 130 inboards, installs on the stopper protrusion 140a of side wall ends or has engaged becket 142 in the mode of welding; Magnet 150, it is attached to the central authorities of yoke 140; Plate 160; And covering 170, it engages with framework 130 to protect inner parts.At this, becket 142 forms more outstanding than yoke 140, and is circular rings or the rectangle ring bigger than plate 160 width.

As Fig. 2 and shown in Figure 3, in the loud speaker 100 of the present utility model, the edge (edge) by framework 130 supporting oscillating plates 110 is attached with voice coil loudspeaker voice coil 120 in the bottom surface of oscillating plate 110.At the inner space of framework 130 yoke 140 of U type is installed, at the central portion of yoke magnet 150 and plate 160 is installed, thereby between plate 160 and yoke 140, forms magnetic circuit.At this moment, according to the utility model, at the inboard stopper protrusion 140a that forms of the side wall ends of U type yoke, make becket 142 install or be bonded on this stopper protrusion 140a, thereby can in the magnetic circuit that forms by yoke 140 and plate 160, obtain high density and uniform magnetic force in the mode of forcing to fill in or weld.And as shown in Figure 3, becket 142 can be more outstanding than yoke 140, and bigger than plate 160 width.

Below, the action of the loud speaker of the present utility model that as above constitutes is described.

At first, as shown in Figure 2, loud speaker of the present utility model forms the magnetic circuit of slave plate 160 to yoke 140 by the gap (Gap) between yoke 140 and the plate 160, and the voice coil loudspeaker voice coil 120 attached to oscillating plate 110 is installed in the gap.In this state, when voice coil loudspeaker voice coil 120 applies the signal of telecommunication, form electric field, make oscillating plate 110 vibrations and the generation sound equipment by the electric current that flows in the voice coil loudspeaker voice coil between the magnetic circuit 120.

And, according to loud speaker of the present utility model, on the stopper protrusion 140a of the inboard, yi word pattern end of yoke 140, install or engaged becket 142, thereby can in the gap (Gap) that forms by plate 160 and yoke 140, obtain high density and uniform magnetic force in the mode of forcing to fill in or weld.

In addition, as shown in Figure 4,, need not to use under the situation of additional metals ring according to yoke 140 of the present utility model, can the integrally formed to the inside projection 142 of the side wall ends of yoke 140 '.

More than, the embodiment shown in the reference diagram and the utility model is illustrated still, it will be understood by those skilled in the art that the utility model can realize various distortion and the embodiment that equates with it according to foregoing.

Claims

1. a loud speaker yoke is characterized in that, forms sidewall at the edge of flat board, forms projection in the inboard of above-mentioned sidewall.

2. a loud speaker yoke is characterized in that, above-mentioned yoke comprises:

U type yoke main body, the sidewall yi word pattern at the edge that it is dull and stereotyped is outstanding, forms stopper protrusion in the inboard of sidewall; And

Becket, it is bonded on the stopper protrusion that forms on the inboard of side wall ends of above-mentioned yoke main body.

3. loud speaker as claimed in claim 2 is characterized in that, above-mentioned becket is circular rings or the rectangle ring bigger than plate width.

4. a loud speaker is characterized in that, this loud speaker comprises: the oscillating plate that produces sound equipment by vibration; Make the voice coil loudspeaker voice coil of above-mentioned vibration plate vibrates when electric current flows, this voice coil loudspeaker voice coil is attached to above-mentioned oscillating plate, and is arranged in magnetic circuit; Framework, it supports above-mentioned oscillating plate, and forms installing space in the inboard; Yoke, described yoke is installed in the installing space of said frame inboard, and in the integrally formed to the inside projection of the side wall ends of described yoke, and perhaps engaging on the stopper protrusion of the inboard of the side wall ends of described yoke has becket; Magnet, it is attached to the central authorities of above-mentioned yoke; And plate, it is attached on the above-mentioned magnet, and forms described magnetic circuit by gap and above-mentioned yoke.

5. loud speaker as claimed in claim 4 is characterized in that, above-mentioned becket is circular rings or the rectangle ring bigger than plate width.