WO2011134250A1

WO2011134250A1 - Thin type loudspeaker

Info

Publication number: WO2011134250A1
Application number: PCT/CN2010/078261
Authority: WO
Inventors: 柴国强; 吕振华; 陆福根
Original assignee: 苏州上声电子有限公司
Priority date: 2010-04-30
Filing date: 2010-10-29
Publication date: 2011-11-03
Also published as: CN201690585U

Abstract

A thin type loudspeaker, includes: a magnetic circuit system, a voice cone, a voice coil of which the top part is fixedly connected to the voice cone, a frame used for mounting the voice cone, and a core-locating support film mounted between the voice cone and the frame. The outer side of the core-locating support film is sticked to the frame, and the inner side of the core-locating support film is sticked to the outer wall of the voice cone. The thin type loudspeaker has high adjustability, and has lower height than a conventional thin type loudspeaker without affecting the performance of the loudspeaker.

Description

Thin car speaker

Technical field

The present invention relates to a speaker, and more particularly to a thin car speaker.

Background technique

In the prior art, the speaker comprises three parts: a vibration system, a magnetic circuit system and an auxiliary system, wherein the magnetic circuit system comprises a permanent magnet and a magnetic conductive plate; the vibration system comprises a cone paper cone, a voice coil and a fixed core piece; the auxiliary system Includes basin frame, terminal block and dust cover. As shown in Figure 1, the upper end of the voice coil 1' of the vibration system is fixed on the paper cone 2', and the fixed core piece 3' is corrugated, and one end thereof and the basin frame 4' pass the glue. Bonded together, the other end is bonded to the upper end of the voice coil 1'. In order to adapt to the trend of lightening and flattening the speaker, the paper cone is designed to be flat. However, such a flat paper cone is insufficient in rigidity and narrow in width, and it must have a certain height, which would otherwise affect the performance of the speaker.

Summary of the invention

The technical problem to be solved by the present invention is to provide an improved thin speaker to reduce the height without affecting the performance.

In order to solve the above technical problem, the present invention adopts the following technical solution: a thin speaker including a magnetic circuit system, a tapered paper cone, a voice coil fixedly connected to the upper end portion and the cone paper cone, and used for setting the tapered support paper a basin frame and a core piece disposed between the cone and the basin frame, the outer side of the core piece being bonded to the basin frame, the inner side of the core piece being bonded On the outer side wall of the paper cone.

Preferably, the speaker according to the present invention may further comprise a convex portion protrudingly provided on the outer side wall of the paper cone, the fixed core supporting piece being correspondingly bonded to the outer side wall of the paper cone above the convex portion. On the one hand, the convex portion can play a positioning role for ensuring the consistency of the fixed core piece and the paper cone when bonding, and on the other hand, the convex portion can also have a filtering effect, and by designing the shape of the convex portion, The splitting vibration of the speaker can be reduced, the distortion of the speaker is lower, and the frequency response is smoother. More preferably, a portion of the end of the cored piece abuts against the projection. In this way, the convex portion can also enhance the robustness of the vibration system.

According to a more specific aspect of the invention, the projections and the paper cone are preferably arranged in an integrally formed arrangement.

Further, the speaker is a common circular shape, and the fixed core piece is preferably annular, and the convex portion extends in the circumferential direction about the center line of the paper cone.

The surface of the cored piece is preferably corrugated.

The direction of the height of the speaker referred to in the present invention coincides with the direction of the axis of the cone.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

Since the inner side of the fixed core piece is bonded to the outer side wall of the paper cone instead of the voice coil, the support of the fixed core piece enhances the rigidity of the paper cone, reduces the distortion caused by the split vibration of the speaker, and the frequency response Smoother, so that the speaker can be further flattened without affecting the performance of the speaker; at the same time, under the condition that the installation depth of the speaker is limited, the effective height of the paper cone adopting this structure is much deeper than that of the traditional speaker cone, and the widening The bandwidth of the speaker. In addition, the present invention has a high degree of adjustability, that is, by adjusting the bonding position of the fixed core piece on the outer side wall of the paper cone, speakers of different heights can be obtained, thereby being able to meet different height requirements in different applications.

DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic structural view of a speaker in the prior art;

Figure 2 is a front elevational view of the present invention;

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is an enlarged view of a portion B in Figure 3.

Among them: 1', voice coil; 2', paper cone; 3', fixed core support; 4', basin frame; 1, magnetic circuit system; 2, paper cone; 3, voice coil; 4, basin frame; , fixed core support; 6, convex; 7, dust cover; 8, folding ring; 10, magnetic support piece; 11, permanent magnet; 12, shield.

detailed description

Referring to FIG. 2, the thin car speaker provided in this embodiment is a common circular shape. Referring to Figures 3 and 4, the speaker comprises a magnetic circuit system 1, a cone of paper cones 2, a voice coil 3, a basin frame 4, a toroidal fixed core piece 5, an outer wall of the convex cone 2 and a paper The bowl 2 is integrally formed with an annular projection 6, a dust cover 7, and other auxiliary members.

The magnetic circuit system 1 includes a magnetic permeable support 10, a permanent magnet 11 and a shield case 12. The magnetic circuit system 1 is a known structure and will not be described in detail herein.

The cone paper cone 2, the voice coil 3 and the core piece 5 constitute a vibration system of the speaker. The upper end portion of the voice coil 3 is fixedly connected to the paper cone 2, and the upper portion of the paper cone 2 is fixedly connected to the basin frame 4 via the folding ring 8, and the outer side portion of the fixed core piece 5 is bonded to the basin frame 4 by glue. The inner portion is bonded to the outer side wall of the paper cone 2 above the convex portion 6, and at the same time the holding portion is in contact with the convex portion 6.

Since the inner side portion of the fixed core piece 5 is bonded to the outer side wall of the paper cone 2 instead of the voice coil 3, the vibration system composed of the paper cone 2 and the positioning support piece 5 is further flattened by the support of the fixed core piece 5. It does not affect the performance of the speaker; at the same time, under the condition that the installation depth of the speaker is limited, the effective height of the paper cone 2 is much deeper than that of the conventional speaker cone, and the bandwidth of the speaker is widened. By optimizing the shape of the convex portion 6, the distortion caused by the splitting vibration of the speaker can be further reduced, and the frequency response of the speaker can be made smoother.

The present invention has been described in detail above, and is intended to be understood by those skilled in the art of the invention. Modifications or modifications are intended to be included within the scope of the invention.

Claims

A thin speaker comprising a magnetic circuit system (1), a tapered paper cone (2), and a voice coil (3) fixedly connected to the tapered paper cone (2) at an upper end portion, for setting a setting a basin frame (4) supporting a cone of paper cones (2) and a cored piece (5) disposed between the cone of paper cones (2) and the basin frame (4), the core The outer portion of the support piece (5) is bonded to the basin frame (4), characterized in that the inner side portion of the fixed core piece (5) is adhered to the outer side wall of the paper cone (2) .

2. A thin speaker according to claim 1, wherein said speaker further comprises a convex portion projecting from a portion of the outer side wall of the paper cone (2) and disposed on the outer side wall of said paper cone (2) ( 6) The fixed core piece (5) is correspondingly bonded to the outer side wall of the paper cone (2) above the convex portion (6).

3. A thin loudspeaker according to claim 2, characterized in that at least part of the end of the fixed core piece (5) abuts against the projection (6).

The thin speaker according to claim 2, characterized in that the convex portion (6) is integrally formed with the paper cone (2).

The thin speaker according to any one of claims 12 to 4, characterized in that the fixed core piece (5) is circular, and the convex portion (6) is along the paper cone (2) The center line of the axis extends in the circumferential direction of the axis.

6. A thin loudspeaker according to claim 1, characterized in that the surface of the fixed core piece (5) is corrugated.