JPH0984179A - Edgeless speaker and assembling method for edgeless speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability by making a sliding part a curvature shape and performing energization by an elastic contact with a sliding surface. SOLUTION: When the flange 21 of a curvature shape is provided at the outer peripheral part of seal material 20, the flange is brought into freely slidably elastic contact with the sliding surface of the internal surface 9a of the frame 9 through pressing force to the side of the internal surface 9a of the frame 9 and a diaphragm 13 vibrates, the flange 21 of the seal material 20 is made to slide, while being in an elastic contact with the sliding surface of the internal surface 9a of the frame 9. The followup ability of the flange 21 to the sliding surface accompanying the vibration of the diaphragm 13 becomes excellent. Even if the dispersion of the dimension accuracy of parts such as the frame 9 and a ring 16, and the dimension change caused by the temperature change, etc., are generated, the sealing state with the internal surface 9a of the frame 9 can be maintained because the dispersion and the dimension change can be absorbed by the elastic contact by the pressing force to the side of the sliding surface of the seal material 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention eliminates an annular edge attached between an inner peripheral surface of an opening of a speaker frame and an outer peripheral surface of a diaphragm, and is suitable as a bass speaker and an edgeless speaker. The present invention relates to an assembly method for an edgeless speaker.

[0002]

2. Description of the Related Art As a bass speaker in recent years,
It is a small-diameter speaker, and the ring-shaped edge attached between the inner peripheral surface of the opening of the speaker frame and the outer peripheral surface of the diaphragm is removed so that sufficient sound pressure can be obtained and sound distortion is reduced. An edgeless speaker having a configuration is known.

That is, by forming a minute gap (annular space) having a width of about 1 mm between the inner peripheral surface of the opening of the speaker frame and the outer peripheral surface of the ring around the diaphragm, the diaphragm vibrates smoothly. Not only that, the air flow around the diaphragm is obstructed, and the speaker functions as a bass speaker.

FIG. 10 shows an example of the configuration of such an edgeless speaker, in which a cancel magnet 2, a pole yoke 3, a magnet 4 and a plate 5 constitute a magnetic circuit 1. In the magnetic gap between the pole piece 3a and the plate 5, a voice coil 8 attached to the bobbin 7 is interposed.

The upper and lower stages of the bobbin 7 are supported by an upper damper 10 and a lower damper 11, one end of which is attached to the frame 9. Further, on the upper stage of the bobbin 7, there is a diaphragm 13 having a center cap 12 attached to the center thereof.
The central hole 14 is fixed. The ring 16 attached to the outer peripheral end of the diaphragm 13 and the inner surface 9 of the frame 9
A width of about 1 m is provided between the ring 16 and a so that the ring 16 does not contact the inner surface 9a of the frame 9 when the diaphragm 13 vibrates.
An annular space of about m is provided.

When driving, the upper damper 10
When the diaphragm 13 vibrates as the bobbin 7 supported by the lower damper 11 moves up and down, the diaphragm 13
Since the ring 16 at the outer peripheral end moves along the inner surface 9a of the frame 9 without making contact, the vibration amplitude of the diaphragm 13 is increased, so that sufficient sound pressure can be obtained even with a small-diameter speaker. It is possible to obtain low-pitched sound with low sound distortion.

[0007]

By the way, in the above-mentioned edgeless speaker, the ring 16 and the frame 9 are provided.
By providing an annular space between the inner surface 9a and the inner surface 9a of the frame 9, contact of the ring 16 with the inner surface 9a of the frame 9 can be avoided. Not only is strict mounting accuracy required,
There is a problem that unnecessary wind noise and the like are generated due to the circulation of air generated in the annular space due to the vibration of the diaphragm 13, which causes sound quality deterioration (performance deterioration).

Therefore, in order to solve these problems, for example, as shown in FIG. 11, a ring-shaped sealing material 17 is provided on the entire circumference of the end of the ring 16 so as to seal the space between the inner surface 9a of the frame 9 and the inner surface 9a. Mounting, inner surface 9a of frame 9
The sliding contact with the ring 16 not only keeps the space between the ring 16 and the inner surface 9a of the frame 9 constant, but also prevents the air flow before and after the diaphragm 13 from being blocked by the sealing material 17. Is thought to be resolved.

However, if the dimensional accuracy of the parts such as the frame 9 and the ring 16 is varied, or if the dimension is changed due to temperature change, a gap may be partially formed between the seal material 17 and the inner surface 9a of the frame 9. However, if air circulation occurs in that part, unnecessary wind noise and the like will still occur, which will lead to deterioration of sound quality (performance deterioration), resulting in deterioration of reliability. There was a problem.

The present invention has been made in view of such circumstances, and an object thereof is to provide an edgeless speaker and an assembling method of the edgeless speaker which can improve reliability.

[0011]

According to the first aspect of the present invention,
An edgeless speaker that is provided integrally with a diaphragm, has a sliding portion that seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. In addition, the sliding portion has a curved shape and is biased so as to elastically contact the sliding surface.

According to a second aspect of the present invention, the diaphragm is provided integrally with the diaphragm, the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame are sealed, and the inner peripheral surface of the opening is slidable. An edgeless speaker having a sliding portion formed as described above, wherein the sliding portion is made of a deformable member, and a notch or notch is formed in a part of the sliding portion.

According to a third aspect of the present invention, which is provided integrally with the diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. An edgeless speaker having a slidable portion formed of the first and second slidable members, each of which is deformable and has a notch or a notch formed therein. The two sliding members are arranged so that the notches or notches do not overlap each other.

According to a fourth aspect of the present invention, a ring attached to the outer peripheral surface side of the diaphragm seals between the inner peripheral surface of the opening and the ring, and slides with respect to the sliding surface of the inner peripheral surface of the opening. An edgeless speaker assembling method in which a freely movable sliding part is attached, wherein the sliding part is sandwiched by a part of the ring, and the sliding part is fixed to the ring side.

According to a fifth aspect of the present invention, the ring is provided on the ring attached to the outer peripheral surface side of the diaphragm, and has a sliding portion that seals the inner peripheral surface of the opening of the speaker frame. The moving part is an edgeless speaker slidable with respect to the inner peripheral surface of the opening, and the ring and the sliding part are integrally formed.

According to a sixth aspect of the present invention, the diaphragm is provided integrally with the diaphragm, the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame are sealed, and the inner peripheral surface of the opening is slidable. An edgeless loudspeaker having a sliding portion formed as described above, wherein the sliding portion is formed of a fibrous porous member.

According to a seventh aspect of the present invention, which is provided integrally with the diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. An edgeless speaker having a sliding part formed as described above, wherein the sliding part is formed of a fibrous porous member, and the main fiber direction of the fibrous porous member is the sliding direction of the sliding part. The feature is that they are the same.

[0018]

In the edgeless speaker of the present invention, the sliding portion that is slidable with respect to the sliding surface has a curved shape, and is elastically contacted with the sliding surface by the urging force to the sliding surface side. Therefore, even if there are variations in the dimensional accuracy of parts such as speaker frames and rings, or if the dimensions change due to temperature changes, etc., those variations and dimensional changes are urged toward the sliding surface of the sliding part. Since it can be absorbed by the elastic contact with, the sealed state with the inner peripheral surface of the opening of the speaker frame can be maintained.

Further, since the notch or notch is formed in a part of the sliding portion made of a deformable member, the sliding portion can be appropriately deformed, so that the sliding portion can smoothly slide. Can be done.

Furthermore, since the first and second sliding members are adhered so that the notches or notches do not overlap each other,
It is possible to suppress the flow of air due to the notches or notches while imparting appropriate deformability to the sliding portion.

Furthermore, since the sliding portion is sandwiched by a part of the ring and the sliding portion is fixed to the ring side, from the ring side due to the friction of the sliding portion sliding while being in sliding contact with the sliding surface. Is prevented from leaving.

Further, since the ring and the sliding portion are integrally molded, the reaction force from the sliding surface applied to the sliding portion at the time of sliding can be received by the sliding portion and the ring as a whole. It is possible to reduce the pressure change on the sliding surface due to the moving part, and to make the sliding contact force on the sliding surface uniform.

Further, since the sliding portion is formed of the fibrous porous member, it is possible to reduce the friction with the sliding surface when the sliding portion slides despite having elasticity. The sliding portion can be made relatively large, and the sealed state with the inner peripheral surface of the opening of the speaker frame can be favorably maintained.

Furthermore, since the sliding portion is formed of the fibrous porous member and the main fiber direction of the fibrous porous member is the same as the sliding direction of the sliding portion, it is perpendicular to the sliding surface. Since an appropriate elastic force is applied in the direction, it is possible to maintain a good sealing condition between the inner peripheral surface of the opening of the speaker frame and an appropriate rigidity in the sliding direction of the sliding surface. The shape of the sliding portion can be maintained.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings described below, the same parts as those in FIG. 10 will be assigned the same reference numerals and overlapping explanations will be omitted.

[First Embodiment] FIG. 1 shows an embodiment of the edgeless speaker of the present invention, in which an end portion of the ring 16 is made of an elastic material such as rubber or foam rubber, or a fibrous material. A sealing material 20 is attached as a deformable sliding portion made of a porous member. The sealing material 20 is the diaphragm 13.
Alternatively, it is arranged so as to seal the entire space between the ring 16 and the inner surface 9 a of the frame 9. As a result, the flow of air inside the frame 9 (in other words, inside and outside the cabinet) is restricted.

A curved flange 21 is provided on the outer peripheral portion of the seal member 20, and is slidable on a sliding surface which is the inner surface 9a of the frame 9 by an urging force to the inner surface 9a of the frame 9. Is in contact with.

In such a structure, when the diaphragm 13 vibrates, the flange 21 of the sealing material 20 slides while elastically contacting the sliding surface which is the inner surface 9a of the frame 9, so that the diaphragm 1
The followability of the flange 21 to the sliding surface due to the vibration of No. 3 becomes good, and as described above, the frame 9 and the ring 16
Even when variations in dimensional accuracy of parts such as the above and dimensional changes due to temperature changes and the like occur, these variations and dimensional changes are absorbed by elastic contact of the sealing member 20 with the urging force on the sliding surface side. Therefore, the sealed state with the inner surface 9a of the frame 9 can be maintained.

[Second Embodiment] FIG. 2 shows a second embodiment in which the structure of the sealing material 20 of FIG. 1 is changed, and a plurality of flanges 21 are provided at predetermined intervals. A cutout 22 is provided.

That is, in this embodiment, by providing the flange 21 with a plurality of notches 22,
Since the rigidity of the flange 21 is reduced as compared with the seal material 20 of FIG. 1, the flange 21 is given an appropriate deformability, and the followability on the sliding surface of the seal material 20 due to the vibration of the diaphragm 13 is further improved. Good sealing material 2
The sliding of 0 is performed smoothly.

In this embodiment, the case where the flange 21 is provided with the plurality of notches 22 has been described, but the present invention is not limited to this example, and notches may be provided.

[Third Embodiment] FIGS. 3 and 4 show a third embodiment in which the structure of the sealing material 20 of FIG. 2 is changed, and a sealing material 20A shown in FIG. Is the first
And two sealing pieces 20a, 20 which are second sliding members.
The flanges 21a and 21b are overlapped with each other so that the plurality of notches 22 provided on the flanges 21a and 21b do not overlap each other.

That is, in this embodiment, since the notches 22 of the upper and lower flanges 21a and 21b are arranged so as not to overlap with each other, the flanges are the same as in the second embodiment. While the appropriate deformability given to 21 is maintained and each notch 22 is covered by the flanges 21a and 21b of each other, air circulation by the notches 22 is suppressed, and unnecessary wind noise and the like. Is prevented from occurring.

[Fourth Embodiment] FIG. 5 shows a method of attaching a sealing material to the ring 16 shown in FIG. 1. A fixing piece 16a is provided on a part of the ring 16 and the fixing piece 16a is provided. The end portion 23 of the sealing material 20B is sandwiched and fixed to the ring 16 side by bending.

Incidentally, the sealing member 20 by the fixed piece portion 16a
The fixing of B is not limited to the above-described fixing by bending, but the fixing piece 16a is thermocompression-bonded to the sealing material 2
You may make it clamp the edge part 23 of 0B.

Thus, for example, when a porous polymer material is used as the material for the sealing material 20B to reduce the weight, the sealing material 20B is usually adhered and fixed to the end surface of the ring 16 with an adhesive. However, in this case, since it is porous, the substantial adhesive area to the end face of the ring 16 is reduced, and when trying to obtain a sufficient adhesive force, the type and amount of the adhesive are controlled, the temperature, and the pressure bonding time. It is necessary to strictly control the settings of the ring 1 and the like, which not only hinders ease of assembly and quality improvement, but also causes friction with the sliding surface when the sealing material 20B slides, so that the ring 1
There is a risk that it will come off from the end face of 6, but ring 1
Fixing by thermocompression bonding to the 6 side eliminates these problems.

The ring 16 may be made of a thermoplastic material such as plastic or styrene, and may be clamped by the fixed piece 16a of the ring 16 while thermally deforming the end 23 of the sealing material 20B. Since the thermoplastic member has an adhesive effect, the sealing material 20B is more firmly adhered and fixed to the ring 16 by applying heat.

[Fifth Embodiment] FIG. 6 shows a fifth embodiment in which the structure of the seal member 20B of FIG. 5 is changed. The ring 16 and the seal member 20B are integrally molded. Is formed by.

In this case, in order to obtain the elastic contact force of the sealing material 20B with respect to the inner surface 9a of the frame 9, the sealing material 20B may be made of a deformable material made of a polymer, or the ring 16 and the sealing material. The whole of 20B may be similarly made of a deformable material.

In any case, the sealing material 20B is the ring 1
6 is integrated with the seal member 20, the reaction force from the sliding surface received by the elastic contact with the inner surface 9a of the frame 9 is generated.
Since it can be received by the entire ring 16 including B, the pressure change at the contact portion between the seal material 20B and the sliding surface of the frame 9 can be reduced, and the sliding contact force of the seal material 20B with respect to the sliding surface can be reduced. Since it is kept even, the sliding operation of the sealing material 20B on the sliding surface is smoothly performed.

By the way, in the case of FIG. 6, the sealing material 20 is used.
Although B is shown attached to the outside of the outer peripheral end of the diaphragm 13, the present invention is not limited to this, and the sealing material 20B is attached to the inside of the outer peripheral end of the diaphragm 13 as shown in FIG. It may be in the form.

[Sixth Embodiment] FIG. 8 shows a sixth embodiment in which the structure of the sealing material 20B shown in FIG. 5 is changed, and glass wool is formed on substantially the entire end surface of the ring 16. A sealing material 20C made of a fibrous porous member such as carbon fiber is provided.

That is, it is preferable that the sealing material 20C which makes elastic contact with the sliding surface which is the inner surface 9a of the frame 9 is smaller than the sliding range of the sealing material 20C in order to reduce friction during sliding. In order to increase the degree of airtightness inside the frame 9, it is preferable to make the contact area of the sealing member 20C with respect to the sliding surface, which is the inner surface 9a, as large as possible.

Therefore, by forming the sealing material 20C with a fibrous porous member, it is possible to reduce the friction with the sliding surface when the sealing material 20C slides despite having elasticity. The sealing material 20C can be made relatively large, and the degree of sealing with the sliding surface that is the inner surface 9a of the frame 9 can be increased.

[Seventh Embodiment] FIG. 9 shows a seventh embodiment, in which the main fiber direction of the sealing material 20C made of a fibrous porous member is set to the inner surface 9a of the frame 9.
Is parallel to the sliding surface (the sliding direction of the sealing material 20C).

As a result, an appropriate elastic force is applied in a direction perpendicular to the sliding surface which is the inner surface 9a of the frame 9, so that the sealed state with the sliding surface which is the inner surface 9a of the frame 9 is improved. It is possible to maintain the shape, and since an appropriate rigidity is applied in the sliding direction of the sliding surface, it is possible to maintain the shape of the sealing material 20C.

[0047]

As described above, according to the edgeless speaker and the method of assembling the edgeless speaker of the present invention, the sliding portion which is slidable with respect to the sliding surface is formed into a curved shape and attached to the sliding surface side. Since it is elastically contacted with the sliding surface by the force, even if the dimensional accuracy of parts such as the speaker frame and the ring varies, or if the dimension changes due to temperature changes, etc. Since the change can be absorbed by the elastic contact of the sliding portion with the urging force to the sliding surface side, it is possible to maintain the sealed state between the inner peripheral surface of the opening of the speaker frame.

Further, since the notch or notch is formed in a part of the sliding portion made of a deformable member, the sliding portion can be appropriately deformed, so that the sliding portion can smoothly slide. Can be done.

Furthermore, since the first and second sliding members are adhered so that the cuts or the cutouts do not overlap each other,
It is possible to suppress the flow of air due to the notches or notches while imparting appropriate deformability to the sliding portion.

Furthermore, since the sliding portion is sandwiched by a part of the ring and the sliding portion is fixed to the ring side, from the ring side due to the friction of the sliding portion sliding while being in sliding contact with the sliding surface. Is prevented from leaving.

Further, since the ring and the sliding portion are integrally formed, the reaction force from the sliding surface applied to the sliding portion at the time of sliding can be received by the sliding portion and the ring as a whole. It is possible to reduce the pressure change on the sliding surface due to the moving part, and to make the sliding contact force on the sliding surface uniform.

Further, since the sliding portion is formed of the fibrous porous member, it is possible to reduce the friction with the sliding surface when the sliding portion slides despite having elasticity. The sliding portion can be made relatively large, and the sealed state with the inner peripheral surface of the opening of the speaker frame can be favorably maintained.

Furthermore, since the sliding portion is formed of the fibrous porous member and the main fiber direction of the fibrous porous member is the same as the sliding direction of the sliding portion, it is perpendicular to the sliding surface. Since an appropriate elastic force is applied in the direction, it is possible to maintain a good sealing condition between the inner peripheral surface of the opening of the speaker frame and an appropriate rigidity in the sliding direction of the sliding surface. The shape of the sliding portion can be maintained. Therefore, since the vibrating operation of the diaphragm is performed smoothly, the vibration amplitude of the diaphragm becomes sufficient, and the performance deterioration is prevented, so that the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an edgeless speaker of the present invention.

FIG. 2 is a plan view showing a second embodiment when the configuration of the seal material of FIG. 1 is changed.

FIG. 3 is a plan view showing a third embodiment when the configuration of the seal material of FIG. 2 is changed.

FIG. 4 is a cross-sectional view showing the sealing material of FIG.

5 is a cross-sectional view showing a method of attaching a sealing material to the ring of FIG.

6 is a cross-sectional view showing a fifth embodiment when the configuration of the seal material of FIG. 5 is changed.

7 is a cross-sectional view showing a fifth embodiment when the configuration of the seal material of FIG. 5 is changed.

FIG. 8 is a cross-sectional view showing a sixth embodiment when the configuration of the seal material of FIG. 5 is changed.

FIG. 9 is a cross-sectional view showing a seventh embodiment for explaining the arrangement direction of the fibers of the sealing material made of the fibrous porous member shown in FIG.

FIG. 10 is a half-cut sectional view showing a conventional edgeless speaker.

11 is a half cross-sectional view for explaining a case where a sealing material is provided on the edgeless speaker of FIG.

[Explanation of symbols]

 9 frame 9a inner surface 13 diaphragm 16 ring 16a fixed piece 20,20A, 20B, 20C sealing material 21, 21a, 21b flange 22 notch 20a, 20b sealing piece

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[Procedure amendment]

[Submission date] October 30, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[First Embodiment] FIG. 1 shows an embodiment of the edgeless speaker of the present invention, in which an end portion of the ring 16 is made of an elastic material such as rubber or foam rubber, or a fibrous material. A sealing material 20 is attached as a deformable sliding portion made of a porous member. The sealing material 20 is the diaphragm 13.
Alternatively, it is arranged so as to seal the entire space between the ring 16 and the inner surface 9 a of the frame 9. As a result, the flow of air inside the frame 9 (in other words, inside and outside the cabinet) is restricted. That is, the diaphragm 13 here
Alternatively, the state in which the entire space (annular space) between the ring 16 and the inner surface 9a is hermetically sealed is such that unnecessary wind noise or the like generated due to pressure change inside the cabinet due to vibration of the diaphragm 13 does not occur. In addition, the closed state means that the flow of air is restricted.

Continued Front Page (72) Inventor Tomohiro Suenaga 426-10 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant

Claims (7)

[Claims] 1. A sliding portion which is provided integrally with a diaphragm, seals between an outer peripheral side surface of the diaphragm and an inner peripheral surface of an opening of a speaker frame, and is slidable with respect to the inner peripheral surface of the opening. The edgeless speaker according to claim 1, wherein the sliding portion has a curved shape, and is biased to elastically contact the sliding surface. 2. A sliding portion which is provided integrally with a diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. The edgeless speaker having the above-mentioned, wherein the sliding portion is made of a deformable member, and a notch or notch is formed in a part of the sliding portion. 3. A sliding portion which is provided integrally with the diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. An edgeless speaker having: a first and a second sliding member, wherein the sliding portion is deformable and is provided with a notch or a notch, wherein the first and second sliding members are An edgeless speaker, wherein the notches or notches are arranged so as not to overlap each other. 4. A slide attached to the outer peripheral surface side of the diaphragm for sealing between the inner peripheral surface of the opening and slidable with respect to the sliding surface of the inner peripheral surface of the opening. A method for assembling an edgeless speaker, wherein a part is attached to the ring to sandwich the sliding part, and the sliding part is fixed to the ring side. 5. A ring is provided on a ring attached to the outer peripheral surface side of the diaphragm, and has a sliding portion that seals between the inner peripheral surface of the opening of the speaker frame, and the sliding portion is within the opening. An edgeless speaker slidable with respect to a peripheral surface, wherein the ring and the sliding portion are integrally molded. 6. A sliding portion which is provided integrally with a diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. An edgeless speaker having the above-mentioned, wherein the sliding portion is formed of a fibrous porous member. 7. A sliding portion which is provided integrally with a diaphragm, seals between the outer peripheral side surface of the diaphragm and the inner peripheral surface of the opening of the speaker frame, and is slidable with respect to the inner peripheral surface of the opening. An edgeless speaker having the above-mentioned, wherein the sliding portion is formed of a fibrous porous member, and the main fiber direction of the fibrous porous member is the same as the sliding direction of the sliding portion. Edgeless speaker to be.