JP2006229643A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker that can be downsized without the need for decreasing the diameter of an edge part, the minimum resonance frequency or the like of which can be enhanced by adopting an area of the diaphragm broader than that of prior arts, and wherein the edge part can surely be engaged with and supported by the frame without the need for using an adhesive. <P>SOLUTION: The speaker 1 is composed of at least: the frame 6 coupled with a magnetic circuit 5; and the diaphragm 8 the inner circumferential part of which is fixed to a voice coil bobbin 11 with a voice coil 10 wound thereon and the outer circumferential part of which is provided with a edge 7. When a one-side tip part 7c of the edge 7 is fixed to the outer circumferential part beyond the upper end of the frame 6, the one-side tip part 7c of the edge 7 is extended downwardly vertically so as to be in parallel with an axial line of the magnetic circuit 5, a fixed part 7d provided at the inside of the tip part is engaged with an engagement part provided to the outer circumferential part of the frame 6 to integrate the edge 7 with the frame 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a speaker used for various types of audio equipment, and more specifically to a speaker that can be miniaturized.

  Along with miniaturization of audio equipment, miniaturization of speakers is required. However, when downsizing the speaker by reducing the diameter of the speaker, in order to ensure the same vibration area as before, the diameter of the edge provided at the tip of the diaphragm is reduced, and the fixed part to the frame is used. If the tip of the edge made of a certain flat portion is reduced, the fixing strength between the frame and the edge is weakened, which causes a problem in terms of reliability and also a problem in maintaining the shape of the edge.

  In addition, if the outer diameter of the diaphragm is made smaller or the roll diameter of the roll type edge is made smaller for the purpose of miniaturization, the vibration area becomes smaller and the lowest resonance frequency becomes higher and lower frequency. It becomes difficult to reproduce sufficient volume in the band.

  Therefore, as a measure for increasing the vibration area without changing the speaker diameter, a speaker is considered in which a flat portion that is the tip of the edge is fixed along the rising portion or the outer peripheral portion of the frame.

  For example, in Japanese Patent Application Laid-Open No. 9-327088 (Patent Document 1), the speaker aperture is changed by bonding a flat portion that is the tip of an edge along the rising portion of a frame coupled to a magnetic circuit. There is also disclosed a speaker in which the diameter of the roll can be made larger than that of the conventional one, and as a result, the vibration area is increased by increasing the edge area and the amplitude amount of the edge is ensured.

Further, in JP 2003-324793 A (Patent Document 2), if the speaker aperture is the same as the conventional one, the speaker is arranged above the diaphragm as a speaker capable of increasing the vibration area, A frame cover for protecting the diaphragm, a supported part that is disposed below the diaphragm and the frame cover, and is provided on the outer periphery of the diaphragm and is parallel to the radial direction of the diaphragm; and A frame having a support part for supporting the supported part of the frame cover, and the supported part of the diaphragm is sandwiched between the supported part of the frame cover and the support part of the frame. A characteristic speaker device is disclosed.
JP 9-327088 A (Specification 0026) JP 2003-324793 A (specifications 0033 to 0034)

  The speaker aperture in a conventional speaker, in which the flat part provided on the frame side (outer peripheral part side) of the edge is bonded and fixed to the flat part of the frame, is the dimension including the flat part of the frame. How to reduce the size of the part was a countermeasure for miniaturization. However, as described above, the bonding area between the flat portion of the edge and the frame is required to have an appropriate width based on reliability, and the flat portion cannot be reduced unnecessarily.

  Further, since the flat part on the frame side of the edge is necessary for maintaining the shape of the edge roll part, the flat part cannot be reduced. Therefore, it is possible to reduce the size of the speaker without reducing the flat portion of the edge, without reducing the diameter of the diaphragm, and without reducing the reliability of the bonding strength between the flat portion of the edge and the frame. It was an issue.

  In addition, in the speaker described in Patent Document 1, a configuration in which the edge tip is fixed to the inside of the rising part of the frame is described in the specification, but the thickness of the rising part of the frame and the edge tip part are described. The wall thickness is a factor for increasing the speaker aperture.

  Further, in the speaker device described in Patent Document 2, since a part of the front end portion of the diaphragm is required to be sandwiched between the frame cover and the frame, a part of the front end portion of the diaphragm is disposed in the horizontal direction of the frame. As a result, the speaker diameter is increased.

In view of the present situation, the present invention can be reduced in size without reducing the diameter of the edge, and further, the area of the diaphragm can be increased as compared with the prior art, so that the minimum resonance frequency and the like can be improved. An object of the present invention is to provide a speaker capable of reliably engaging and holding the edge of the frame without using an adhesive.

In order to achieve the above object, the invention according to claim 1 of the present invention provides:
It is composed of at least a frame coupled to a magnetic circuit, and a diaphragm having an inner periphery fixed to a voice coil bobbin wound around a voice coil and an outer periphery provided with an edge.
The speaker is characterized in that one end portion of the edge is fixed to the outer peripheral portion beyond the upper end portion of the frame.

The invention according to claim 2
The speaker according to claim 1,
The edge is
One end portion is vertically extended so as to be parallel to the axis of the magnetic circuit, and the inside thereof is fixed to the outer peripheral portion of the frame.

The invention according to claim 3
The speaker according to claim 1,
The edge is
A fixing portion for mounting on the outer peripheral portion of the frame is formed at a tip portion extending vertically downward so as to be parallel to the axis of the magnetic circuit.

The invention according to claim 4
The speaker according to claim 3, wherein
The fixing part is
It is formed integrally with the edge or separately.

The invention according to claim 5
The speaker according to claim 3 or 4,
The frame is
An engaging portion corresponding to the fixed portion at the tip of the edge is formed on the outer peripheral portion.

The invention according to claim 6
The speaker according to claim 5, wherein
The engaging portion is
The fixing portion has a shape capable of receiving the fixing portion.

The invention according to claim 7
The speaker according to any one of claims 3 to 5,
The fixing part is
It is characterized by being joined to a housing to which a speaker is mounted via at least one side surface.

  The speaker according to the present invention has a conventional structure in which the entire tip of one edge of the flat portion extends downward in parallel with the axis of the magnetic circuit, and the inside of the tip is fixed to the outer peripheral surface of the frame. The size corresponding to the horizontal portion of the frame where the edge is fixed is not required, and the size of the diaphragm and the diameter of the edge can be reduced without any reduction. Further, since it is not necessary to make the bonding portion between the edge frame and the frame small, it is possible to sufficiently ensure the reliability of the bonding strength between the edge tip portion and the frame.

  In particular, in the present invention, by forming a fixing portion having a specific shape at the tip of the edge, the edge can be positioned easily and stably when the edge is fixed to the outer peripheral surface of the frame. .

  At that time, by making the fixing part separate from the edge, the edge is a common part, and it is possible to provide the edge with a fixing part having a size, shape and material suitable for the frame shape and material. The speaker characteristics can be changed freely according to the situation. Further, by integrating the edge and the fixing portion, the assembly work can be facilitated without increasing the number of parts.

  In addition, when the edge fixing portion is attached to the outer peripheral portion of the frame, an engaging portion is formed on the outer peripheral surface of the frame, and the edge fixing portion is fitted to the engaging portion, thereby facilitating assembly. Depending on the amount management, it is only necessary to use an adhesive that adversely affects the amplitude and adhesive strength of the edge, so that the quality can be stabilized.

Furthermore, by joining to the speaker housing via at least one side surface of the fixing portion, the fixing portion can fulfill the function of a conventional packing. In particular, when rubber is used as the material for the fixed portion, the rubber can absorb vibrations, suppress vibrations to the housing, and prevent air leakage.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a speaker according to the present invention will be specifically described below with reference to the accompanying drawings. Various modifications can be made without departing from the scope of the present invention, and the disclosed embodiments are described below. It is not limited to only. Main symbols are common to all drawings.

  FIG. 1 shows an example of a loudspeaker according to the present invention. The loudspeaker 1 is equipped with a magnetic circuit 5 comprising a pot-shaped yoke 2, a magnet 3 and a disk-shaped pole plate 4, and is mounted on the magnetic circuit 5. This is an internal magnet type speaker composed of the frame 6, the diaphragm 8 having the edge 7 at the outer peripheral edge, the damper 9, and the voice coil bobbin 11 in which the voice coil 10 is wound.

  In the loudspeaker 1 having such a configuration, the edge 7 of the present invention, as clearly shown in FIG. 1, is an overhang provided extending laterally along the inner and outer edges of the ring-shaped edge main body 7a having a circular section. One of the edges 7b and 7c, that is, the outside protruding edge 7c is pulled out to the outside of the frame 6 beyond the upper end of the frame 6, and its tip is bent substantially perpendicularly downward in parallel with the axis of the magnetic circuit. The inner side is fixed to the outer peripheral portion of the frame 6. At that time, if the overhanging edge 7c can be securely fixed at a predetermined position on the outer peripheral portion of the frame 6, there is no particular limitation on the fixing means. However, by using the following fixing means, the edge can be securely fixed to the frame. And it can be done easily.

  More specifically, as shown in FIG. 2, a semispherical fixing portion 7d is integrally formed along the lower end inside of the outer overhang edge 7c, and is opposed to the hemispherical fixing portion 7d. An engaging portion 6a having a hemispherical concave section corresponding to the fixing portion 7d is formed on the outer periphery of the frame 6, and the fixing portion 7d of the edge 7 is fitted into the engaging portion 6a. Thus, the edge 7 is fixed to the frame 6.

  At that time, if the shape of the fixing portion 7d of the edge 7 is made slightly larger than the engaging portion 6a on the frame 6 side so as to be press-fitted into the engaging portion 6a, the airtight engagement can be achieved. Although it is possible to suppress the use of an adhesive, if necessary, both may be similar to each other, and the adhesive may be partially applied in the engaging portion 6a to fix both. Further, although not shown, by appropriately selecting the shape of the fixing portion 7d of the edge 7 and the shape of the engaging portion 6a of the frame 6, it is possible to securely hold both of them together without using an adhesive. It is.

  The frame 6 uses ABS resin in this embodiment, but the material may be cold-rolled steel plate (SPCC), polycarbonate (PC), etc. Rubbers such as NBR (nitrile butadiene rubber) and SBR (styrene butadiene rubber) can be used.

  By adopting such a form, the minimum resonance frequency is increased by reducing the vibration area by reducing the diameter of the diaphragm 8 and the edge 7, and it is difficult to reproduce a sufficient volume in the low frequency band. Thus, it is possible to provide a highly reliable small speaker in which the degree of engagement between the end portion of the edge 7 and the frame 6 is strong even for a large input.

  FIG. 3 shows another example of the edge 7 in the speaker 1 of the present invention. The protruding edge 7c on the outer side of the edge main body 7a is formed thicker than the other protruding edge 7b. The portion is cut out to form a thin fixed portion 7d. The fixing portion 7d made of this notch is closely fixed to the outer peripheral portion of the upper end of the frame 6 by using an adhesive, thereby integrating the both. By making the fixing portion 7d having a stepped portion, Mounting to the frame 6 is facilitated.

  In FIG. 4, a fixed portion 7d having a small arc shape is formed on the inner side of the protruding edge 7c formed thicker than the thickness of the other protruding edge 7b. The cross-section formed opposite to the outer peripheral portion near the upper end is engaged and fixed to a small arc-shaped engaging portion 6a, and the strength of the overhang edge 7d is improved and the engagement with the frame 6 is made dense. .

  Further, FIG. 5 shows that a fixed portion 7d having a rectangular cross section is formed inside a protruding edge 7c formed thicker than the thickness of the other protruding edge 7b. The edge 7 is easily attached to the frame 6 by being fixedly engaged with an engaging portion 6a formed of a notch portion formed to face a peripheral portion in the vicinity.

  Further, FIGS. 6 to 8 show other examples of the edge 7, each of which is mounted on one overhanging edge 7 c with a member having a specific shape that is separate from the edge 7. . The edge 7 in FIG. 6 is a notch in which a member having an inverted L-shaped cross section is bonded and fixed to the inside of the overhanging edge 7c to form a fixed portion 7d. Adhesive fixed to the part.

  Further, the edge 7 in FIG. 7 is a member having a channel-shaped cross section bonded and fixed to the inside of the overhanging edge 7c to form a fixing portion 7d. The fixing portion 7d is fitted to the upper edge of the frame 6, The edge 7 is fixed to the outer peripheral portion of the frame 6 and may be fixed by an adhesive partially or entirely as necessary.

  Further, the edge 7 in FIG. 8 is obtained by fixing a ring-shaped member having a required width and thickness to the outside of one overhanging edge 7 c forming the edge 7 to form a fixing portion 7 d. A notch corresponding to the thickness of the overhanging edge 7c and the ring-shaped member is formed on the outer periphery, and the inside of the overhanging edge 7c having a fixing portion 7d on the outside is bonded and fixed to the notch. The surface and the outer peripheral surface of the edge 7 are flush with each other.

  The fixing portion 7d manufactured separately from the edge 7 basically uses materials different from the material of the edge, and plastic, steel plate, paper, or the like can be applied as these materials.

  FIG. 9 shows a voice coil bobbin equipped with a magnetic circuit 24 comprising a bottom plate 21 having a center pole, a ring-shaped magnet 22 and a top plate 23, a frame 25 fixed to the upper surface of the top plate 23, and a voice coil 26. 27 and an outer magnet type speaker 20 comprising a damper 28 and a diaphragm 29 for holding the voice coil bobbin 27, and the outer peripheral portion of the diaphragm 29 is fixed to the frame 25 via the edge 7. .

  As shown in FIGS. 9 to 10, the frame 25 of the speaker 20 has an outer peripheral portion through a single or a plurality of horizontal step portions 25 b and 25 b from the fixing portion 25 a to the magnetic circuit 24 toward the tip portion. Since the diameters are sequentially increased, the shape is identical to the shape formed by the step portion 25b in the vicinity of the front end portion of the frame 25 and the rising portion 25c connected to the step portion 25b (in the drawing, a square cross section). The fixing portion 7d is integrally formed on the inside of the overhanging edge 7c of the edge main body 7a, and the fixing portion 7d is adhered to several places as necessary, and the lower surface of the step portion 25b in the vicinity of the tip portion The frame 25 and the edge 7 are integrated by bonding and fixing to the rising portion 25c.

  FIG. 11 shows still another engagement mode between the edge 7 and the frame 25 in the speaker 20, and the frame 25 has a single outer peripheral part from the fixing part 25 a to the magnetic circuit 24 toward the tip part or The outer peripheral portion of the opening of the frame 25 whose diameter has been gradually expanded through a plurality of horizontal step portions 25b extends vertically upward to form a rising portion 25c, and a hemisphere recessed inwardly into the rising portion 25c. 25-shaped engaging part 25d is formed.

  On the other hand, the edge 7 is located outside the edge main body 7a, inside the protruding edge 7c formed to extend vertically downward, and a fixing portion having a semispherical cross section so as to coincide with the engaging portion 25d of the frame 25 7d is formed integrally, and the diaphragm 29 is fixed to the frame 25 by attaching the fixing portion 7d of the edge 7 to the engaging portion 25d of the frame 25.

FIG. 12 shows still another embodiment of the speaker according to the present invention, and shows a form in which the internal magnet type speaker 1 shown in FIG.
That is, the speaker 1 shown in FIG. 1 is provided at the center in the housing 12 using the spacer 14 and the bolt 15 so that the diaphragm 8 faces the opening 13 of the housing 12. .

  At that time, the shape of the fixing portion 7d of the edge 7 is protruded on the opposite side of the frame 6 so that no gap is formed between the opening 13 of the housing 12 and the outer peripheral portion of the frame 6. Thus, the protruding length is a length substantially equal to the width of the gap, and the entire edge 7 is formed of rubber.

  Therefore, when the speaker 1 is mounted in the housing 12 with the fixing portion 7d fixed to the frame 6 in advance, the tip of the fixing portion 7d contacts the opening 13 of the housing 12 so that the opening 13 is formed. Since the sealing portion is sealed, if the fixing portion 7d is fixed to the opening portion 13 using an adhesive, the sealed state can be maintained, and at the same time, the fixing portion 7d made of rubber absorbs vibrations, and is attached to the housing 11. Transmission of vibrations can be suppressed, resonance sound can be reduced, and the role of packing can also be achieved, so that air leakage from the housing 12 can be eliminated and generation of air noise can be prevented.

FIG. 13 shows still another embodiment of the speaker according to the present invention, and shows a form in which the external magnet type speaker 20 shown in FIG.
That is, a part of the opening 31 formed in the baffle plate 30 is cut out to form a stepped portion 32, and the fixing portion 7 d of the edge 7 fixed to the outer periphery of the upper end of the frame 25 is formed on the stepped portion 32. After the contact, for example, the speaker 20 is fixed to the baffle plate 30 using a bolt 33. If the fixing portion 7d is a rubber, the same effect as that of the speaker 1 shown in FIG. 8 can be obtained.

It is a schematic explanatory drawing which shows an example of the speaker concerning this invention. It is an enlarged view which shows the relationship between the edge and frame in the speaker shown in FIG. It is an enlarged view which shows the other example of the edge which comprises the principal part of the speaker of this invention. It is an enlarged view which shows the further another example of the edge which comprises the principal part of the speaker of this invention. It is an enlarged view which shows the further another example of the edge which comprises the principal part of the speaker of this invention. It is an enlarged view which shows the further another example of the edge which comprises the principal part of the speaker of this invention. It is an enlarged view which shows the further another example of the edge which comprises the principal part of the speaker of this invention. It is an enlarged view which shows the further another example of the edge which comprises the principal part of the speaker of this invention. It is a schematic explanatory drawing which shows the other example of the speaker concerning this invention. It is an enlarged view of the principal part of the speaker in FIG. It is an enlarged view which shows the other example of the principal part of the speaker in FIG. It is a schematic explanatory drawing which shows another example of the speaker concerning this invention. It is a schematic explanatory drawing which shows another example of the speaker concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,20 Speaker 2 Yoke 3 Magnet 4 Pole plate 5 Magnetic circuit 6,25 Frame 6a Frame engaging part 7 Edge 7a Edge main body 7b, 7c Overhang edge 7d Fixed part 8 Diaphragm 9 Damper 10 Voice coil 11 Voice coil bobbin 12 Housing Body 13,31 Opening 14 Spacer 15,33 Bolt 30 Baffle plate 32 Step

Claims (7)

It is composed of at least a frame coupled to a magnetic circuit, and a diaphragm having an inner periphery fixed to a voice coil bobbin wound around a voice coil and an outer periphery provided with an edge.
The speaker according to claim 1, wherein one end portion of the edge is fixed to an outer peripheral portion beyond an upper end portion of the frame. The edge is
The speaker according to claim 1, wherein one end portion is vertically extended so as to be parallel to an axis of the magnetic circuit, and an inner side thereof is fixed to a frame outer peripheral portion. The edge is
The speaker according to claim 1, wherein a fixed portion for mounting on an outer peripheral portion of the frame is formed at a tip portion vertically extended downward so as to be parallel to the axis of the magnetic circuit. The fixing part is
The speaker according to claim 3, wherein the speaker is formed integrally with the edge or separately. The frame is
The speaker according to claim 3 or 4, wherein an engaging portion corresponding to a fixed portion at a tip portion of the edge is formed on an outer peripheral portion. The engaging portion is
The speaker according to claim 5, wherein the speaker has a shape capable of receiving the fixing portion. The fixing part is
The speaker according to any one of claims 3 to 5, wherein the speaker is joined to a housing on which the speaker is mounted via at least one side surface.