CN203596912U

CN203596912U - Loudspeaker

Info

Publication number: CN203596912U
Application number: CN201290000171.9U
Authority: CN
Inventors: 中石真一路
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-07
Filing date: 2012-12-28
Publication date: 2014-05-14
Anticipated expiration: 2022-12-28
Also published as: JP2014068342A; JP5731602B2; WO2014038102A1; JP2015146632A; JP6250582B2; HK1222279A1

Abstract

The theme of the utility model lies in providing a loudspeaker which is strong in capability of sound reproduction. In the loudspeaker (10), an end part, opposite to an end part of a winding coil (48), of a cylinder tube (24) extends to the outer side of the radial direction of the cylinder tube (24). A flange part (52), which serves as an extension part, is pasted on a vibrating part (21) through a binding material (BND). Accordingly, the enough bonding strength can be guaranteed through coating the thin BND on a part, clamped between the flange part (52) and the vibrating part (21), of the vibrating part (21).

Description

Loud speaker

Technical area

The utility model relates to the technology of the former sound reproduction that improves loud speaker.

Background technology

Fig. 4 (A) is the figure that represents an example of the structure of hermetic type loud speaker 70 in the past.In the loud speaker 70 of Fig. 4 (A), on backboard 71, configuration is around annular magnet 73 and the annular plate 74 of the newel 72 of this plate 71.The neck of framework 75 be fixed on annular plate 74 before.The part of the coiling coil 77 of voice coil loudspeaker voice coil bobbin 76 is accommodated in the magnetic gap GP1 as the gap between the inner peripheral surface of annular plate 74 and the outer peripheral face of newel 72.The neck of oscillating plate 78 engages with the part of leaving slightly front end of the outer peripheral face of voice coil loudspeaker voice coil bobbin 76.Further, the outer slightly side engagement of the neck on the periphery of lid 79 and the surface (playback face) of oscillating plate 78.In addition, oscillating plate 78 and voice coil loudspeaker voice coil bobbin 76 are covered by the inner peripheral surface of framework 75, set up and play ripple (damper) 80 between the outer peripheral face of bobbin 76 and the inner peripheral surface of framework 75.For example being formed in of this loud speaker discloses in patent documentation 1.

[patent documentation 1] TOHKEMY 2003-116197 communique

As shown in the enlarged drawing of Fig. 4 (B), the oscillating plate 78 of this loud speaker and the bonding part of bobbin 76 become the structure that the front end of the neck that makes oscillating plate 78 and the periphery upper thread of bobbin 76 contact, and lid 79 and the bonding part of oscillating plate 78 become makes to cover the knot hook that 79 periphery contacts with the surface line of oscillating plate 78.But in this structure, if do not coat the bonding agent BND of q.s in the both sides, front and back of each line contact portion, this part is easily peeled off.Therefore, in this loud speaker in the past, there is following problem: the use material of bonding agent as the material that becomes the muddy reason of tonequality increases, and is difficult to improve former sound reproduction.

Summary of the invention

The utility model puts forward in view of such problem, and its object is, provides former sound reproduction high loud speaker.

In order to solve above-mentioned problem, the utility model provides a kind of loud speaker, it is characterized in that:

Described loud speaker comprises:

Shell, has opening and the cavity with this open communication;

Vibration section, is bearing in interior week of above-mentioned opening;

Magnetic loop, has magnetic gap, makes this magnetic gap towards above-mentioned vibration section, is bearing in above-mentioned empty side; And

Bobbin, coil winding is the outer peripheral face of portion at one end, and the above-mentioned overhang of reeling is accommodated in above-mentioned magnetic gap, meanwhile, is bonded in above-mentioned vibration section with the end of the above-mentioned end winding opposition side of reeling;

Above-mentioned bobbin and the radial direction outside expansion of the end above-mentioned end winding opposition side of reeling towards bobbin, this expansion is bonded in above-mentioned vibration section.

In the utility model, bobbin and end coiling coil opposition side are towards the radial direction outside expansion of bobbin, and this expansion is bonded in vibration section.Therefore, if only vibration section be clipped in and bobbin towards the part between expansion outside radial direction, coating adhesive thinly, just can guarantee enough bond strengths.Therefore,, according to the utility model, and make the front end of neck of vibration section and the periphery upper thread of bobbin contact the loud speaker forming to compare, can suppress the use amount of bonding agent.Thus, according to the utility model, and make the front end of neck of vibration section and the periphery upper thread of bobbin contact the loud speaker forming to compare, can provide former sound reproduction high loud speaker.

Accompanying drawing explanation

Fig. 1 is the front elevation as the loud speaker of an example of the present utility model.

Fig. 2 is A-A ' line sectional drawing and this sectional drawing partial enlarged drawing of Fig. 1.

Fig. 3 is side view and the stereogram of the bobbin of the loud speaker of Fig. 1.

Fig. 4 is sectional drawing and this sectional drawing partial enlarged drawing of loud speaker in the past.

In figure, symbolic significance is described as follows:

10,70-loud speaker, 11-shell, 12-opening, 13-cavity, 14-internal face, 15-outside wall surface, 16-pin, 21-vibration section, 22-framework, 23-magnetic loop, 24,76-bobbin, 25-honeycomb core, 26,27-film, 28-yoke portion, 29-permanent magnet, 30-plate, 31-round plate, 32,72-central post portion, 48-coil, 49-edge, 51-cylinder portion, 52-flange portion, 71-backboard, 78-oscillating plate, 79-lid.

Embodiment

With reference to accompanying drawing, example of the present utility model is described on one side on one side below.Fig. 1 is the front elevation as the loud speaker 10 of an example of the present utility model.Fig. 2 (A) is A-A ' the line sectional drawing of Fig. 1.The cavity 13 that the shell 11 of this loud speaker 10 has opening 12 and is communicated with this opening 12.Shell 11 forms roughly egg type.The thickness homogeneous of the shell wall that surrounds cavity 13 of shell 11.Internal face 14 bendings of shell 11 make cavity 13 form roughly egg type.In outside wall surface 15 fixing feet 16 of shell 11.12 one-tenth round shapes of opening of shell 11.Loudspeaker unit 20 embeds this opening 12.

Loudspeaker unit 20 is that the compressional wave using the electric signal obtaining as air is the device that sound wave radiates.Loudspeaker unit 20 has vibration section 21, covers the bobbin 24 between vibration section 21 and magnetic loop 23 in the framework 22 of this vibration section 21, the magnetic loop 23 that is located at ends framework 22 and 21 opposition sides, vibration section and framework 22 from empty 13 sides.

Vibration section 21 comprises the honeycomb core 25 that forms hollow honeycombed structure, and covers two aluminum laminated films 26 and 27 of this honeycomb core 25 from both sides.The film 26 and 27 of vibration section 21 forms the round shape with the diameter slightly less than opening 12.The periphery of the film 26 of vibration section 21 is supported on the interior week of opening 12 by edge 49.

It is roughly coniform that framework 22 is.An axial side and opposite side at framework 22 have round shape opening.Framework 22 makes diameter is large among two openings opening towards vibration section 21, is fixed on the interior circumferential portion of the opening 12 of shell 11.

Magnetic loop 23 is by yoke 28, permanent magnet 29 and the integrated parts of plate 30.Magnetic loop 23 makes magnetic gap GP2 be supported on cavity 13 sides of this vibration section 21 towards vibration section 21.More particularly, the yoke 28 of magnetic loop 23 comprises round plate 31 and the central post portion 32 with these round plate 31 total central shafts.The section (section representing in Fig. 2 (A)) cutting off the face of the central shaft of the round plate by yoke 28 31 and central post portion 32 as section is convex character shape.

Permanent magnet 29 is circular.Among the relative end face 42 and 43 of the thickness direction of this permanent magnet 29, an end face (for example end face 42) is the N utmost point, and other end (for example end face 43) is the S utmost point.Interior all diameters in the hole in permanent magnet 29 are larger than the outer circumference diameter of central post portion 32.The end face 42 of permanent magnet 29 is fixed on round plate 31 to be had on the end face 41 of central post portion 32 1 sides.Central post portion 32 is side-prominent to the end face 43 of permanent magnet 29 by the approximate centre of permanent magnet 29 endoporus.

Plate 30 forms than thin circular of permanent magnet 29 width.Interior all diameters of plate 30 endoporus are larger than the outer circumference diameter of central post portion 32, less than interior all diameters of permanent magnet 29 endoporus.One end face 44 of plate 30 is fixed on the end face 43 of permanent magnet 29.The other end 45 of plate 30 is fixed on the end face that surrounds the opening that diameter is little 46 of framework 22.The inner peripheral surface of plate 30 endoporus surrounds the outer peripheral face from permanent magnet 29 ledges of central post portion 32.And the gap between the inner peripheral surface of this plate 30 and the outer peripheral face of central post portion 32 forms magnetic gap GP2.

Coil 48 is wound on cylindric cylinder 51(Fig. 2 of portion (B) by bobbin 24) the outer peripheral face of an end, meanwhile, using with the end of coiling coil 48 opposition sides, end as flange portion 52(Fig. 2 (B)), to the radial direction outside expansion of bobbin 24.Between the outer peripheral face of cylinder portion 51 of bobbin 24 and the inner peripheral surface of framework 22, set up and play ripple 47.Fig. 3 (A) is the enlarged drawing of the bobbin 24 of Fig. 2 (A).Fig. 3 (B) is the stereogram of Fig. 3 (A).As shown in Fig. 3 (A) and Fig. 3 (B), the flange portion 52 of bobbin 24 is circular.The radial direction size (width dimensions of the outer peripheral face direction from flange portion 52 center towards flange portion 52) of flange portion 52 is less than the diameter of cylinder portion 51.Again, the end face 61 that the thickness direction of flange portion 52 is relative and 62 and the bearing of trend of cylinder portion 51 orthogonal.

As shown in Figure 2 (A) shows, the end of the coiling coil 48 of bobbin 24 is accommodated in the magnetic gap GP2 of magnetic loop 23.Again, as shown in the enlarged drawing of Fig. 2 (B), bobbin 24 and ends coiling coil 48 opposition sides, end, the end face 62 of flange portion 52 is bonded on the film 27 of vibration section 21 by soft bonding agent BND.The end face 62 of the flange portion 52 of bobbin 24 is parallel with the film 27 of vibration section 21 relatively.And, between the end face 62 of this flange portion 52 and the film 27 of vibration section 21, soft bonding agent BND with roughly uniformly thickness smear.

In this magnetic loop 23, the magnetic line of force that permanent magnet 29 produces turns around through yoke 28 and plate 30, and this magnetic line of force crosses magnetic gap GP2.Therefore, if flow through the electric current of tone signal at the coil 48 of bobbin 24, so bobbin 24 is given and the actuating force of the bearing of trend orthogonal direction of coil 48, bobbin 24 and the vibration section 21 that is bonded in its end vibrate.Because the compressional wave of the air of these vibration section 21 generation of vibrations forwards radiates as sound wave.

It is more than the detailed description of the formation of this example.Can obtain following effect according to this example.

The first, in this example, bobbin 24 and ends coiling coil 48 opposition sides, end, towards the radial direction outside expansion of bobbin 24, are bonded in vibration section 21 as the flange portion 52 of this expansion.Therefore,, if only in the part between the flange portion 52 of bobbin 24 that is clipped in of vibration section 21, coat thin layer bonding agent BND, just can guarantee enough bond strengths.Therefore,, according to this example, and make the front end of neck of vibration section and the periphery upper thread of bobbin contact the loud speaker forming to compare, can suppress the use amount of bonding agent.Thus, according to this example, and make the front end of neck of vibration section and the periphery upper thread of bobbin contact the loud speaker forming to compare, can provide former sound reproduction high loud speaker.

The second, in this example, vibration section 21 is by being the honeycomb core 25 of hollow honeycombed structure, forming from two aluminum laminated films 26,27 of sandwich honeycomb core 25.Therefore,, compared with thering is the loud speaker of vibration section of other structures, can improve the reproduction of high range.

The 3rd, in this example, the part towards bobbin 24 radial direction outside expansions of bobbin 24 ends forms circular flange portion 52, and flange portion 52 is parallel with film 27 relatively.Therefore, easily make to be coated on the bonding agent BND thickness homogeneous between flange portion 52 and film 27.Thus, according to this example, the inhomogeneous minimizing of the bonding agent BND of the bonding part of bobbin 24 and vibration section 21, makes bobbin 24 more be difficult to peel off.

The 4th, in this example, internal face 14 bendings of shell 11 make cavity 13 form roughly egg type.Thus, according to this example, can not move back and forth at internal face 14 from vibration section 21 to the sound wave of cavity 13 radiation.Therefore,, according to this example, can suppress the generation of empty 13 standing internal waves.

An example of the present utility model is more than described, but also can have carried out following distortion to described example.

(1), in above-mentioned example, shell 11 is roughly egg type.But, also shell 11 can be made as to rectangle.

(2), in above-mentioned example, vibration section 21 is made up of honeycomb core 25 and film 26 and 27.But, also this vibration section 21 can be replaced as by taper paper and lid constitutor.At this moment, can make as the dispersal direction of the flange portion 52 of bobbin 24 ends (with the end of coiling coil 48 opposition sides, end) identical with the conical surface angle that forms taper paper periphery.

Claims

1. a loud speaker, is characterized in that:

Described loud speaker comprises:

Shell, has opening and the cavity with this open communication;

Vibration section, is bearing in interior week of above-mentioned opening;

2. according to the loud speaker of recording in claim 1, it is characterized in that:

Above-mentioned vibration section comprises the honeycomb core that forms hollow honeycombed structure, and from two aluminum laminated films of the above-mentioned honeycomb core of sandwich.

3. according to the loud speaker of recording in claim 2, it is characterized in that:

The part towards the expansion of bobbin radial direction outside of above-mentioned bobbin end forms circular flange portion, and above-mentioned flange portion is parallel relatively with the above-mentioned empty side film among above-mentioned two films.

4. according to the loud speaker of recording in claim 3, it is characterized in that:

The internal face bending of above-mentioned shell makes above-mentioned cavity be roughly egg shape.