JP2001036983A - Protection cover for speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protection cover for a speaker in which decorating performance can be made satisfactory, and the number of parts can be reduced, and assembly can be simplified, and coats can be reduced. SOLUTION: In this protection cover 16, a ring-shaped recessed part 17 is formed on the outer periphery of a net-shaped part 9 at which plural small holes 19 are formed, and a decorated part 20 whose surface is worked as a polished diamond-cut decorated face is formed on the outer periphery of the recessed part 17. At that time, the outer peripheral edge of the net-shaped part 9 is allowed to exist in the recessed part 17 so that the boundary part can be prevented from being visible. Also, the upper part of the bonded face of a deformed joint part 7 for supporting a diaphragm 8 is pressurized by the recessed part 17 so as not to be peeled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention protects various members such as internal diaphragms by covering the surface of a speaker,
The present invention also relates to a speaker protective cover that is decorated to enhance the commercial value of the speaker.

[0002]

2. Description of the Related Art Speakers used for the output of various kinds of audio equipment are required not only to output high-quality sound but also to be installed in a portion which is visible to the user. Is a very important requirement for a speaker. Therefore, the speaker protection cover provided to protect members such as a diaphragm provided inside the speaker is a member that is most visible to humans, particularly because it is a member that covers the top surface of the speaker, and enhances its decorativeness. This is an important factor for increasing the commercial value of the speaker.

Conventionally, various kinds of such protective covers for speakers have been used, for example, as shown in FIG. This speaker cover will be described together with the structure of a speaker disposed therein. A magnet 42 is accommodated in a magnet accommodating portion in a frame 41, an upper yoke plate 43 is provided at an upper part thereof, and a lower yoke plate 43 is provided at a lower part thereof. A plate 44 is provided. The magnet 42 has a magnetic anisotropy in the vertical direction in the figure, for example, an N pole is located above and an S pole is located below. Upper yoke plate 43 and lower yoke plate 44
A ring-shaped outer yoke 45 having a gap with the periphery of
The gap between the two forms a magnetic gap G.

A supporting portion 4 formed on the upper end of a frame 41
The outer periphery of a deformed joint 47 bent in a U-shape is fixed to 6, and the outer periphery of a diaphragm 48 is connected to the inner periphery of the deformed joint 47. A bobbin 50 is fixed to the back surface of the diaphragm 48, and is disposed so as to be vertically movable within the magnetic gap G. A coil 51 is wound around the magnetic gap G. The periphery of the bobbin 50 is guided by a damper 52 in the vertical direction, so that when an audio current is supplied to the coil 51 from an external output line (not shown), the fixed magnet 42 and the yokes 43 and 44 are fixed. The coil 51 moves up and down by the action of the lines of magnetic force by the
Vibrates and outputs sound.

[0005] A body case 53 having a locking portion 39 is provided on the outer periphery of a frame 41 having such an audio output mechanism.
Has been fixed. A cover lock receiving portion 54 is formed on the inner periphery of the upper portion of the main body case 53, and a ring fitting portion 55 is formed on the upper portion of the outer periphery. The protective cover 57 disposed so as to cover the upper part of the diaphragm 48 includes a mesh portion 49 in which a number of small holes 56 are formed, and a central portion thereof is a protruding surface curved toward the front side of the speaker 40. An engaging portion 58 bent downward is formed on the outer periphery thereof, and the engaging portion 58 is fitted and fixed to the cover locking receiving portion 54 of the main body case 53. Ring fitting portion 5 formed in main body case 53
5 is fitted with a diamond cut ring 61 having a decorative diamond cut surface 60 formed on the outer peripheral surface, and is fixed with an adhesive or the like.

When assembling the loudspeaker 40 having such a structure, as shown in FIG. 6, a main body 62 composed of a frame 41 in which a sound output mechanism is housed and a main body case 53 on the outer periphery thereof is mounted from above. The protective cover 57 and the diamond cut ring 61 are integrated by fitting and fixing to the fitting portions, respectively.

In the conventional loudspeaker 40 having the above structure, the protective cover 57 for protecting the sound output mechanism inside the loudspeaker is provided on the diaphragm 4 even when various external objects collide.
8 and the like are required to have a thickness and a shape that can provide a certain level of strength, and are formed of a material that does not cause a leakage magnetic flux to an internal magnetic circuit.
A large number of small holes 56 are formed so that the output sound from the diaphragm 48 can be smoothly output to the outside, and a function that does not impair the aesthetic appearance as a member constituting the front part of the speaker. Is required.

For this reason, the protective cover 57 is made of a non-magnetic plate material such as an aluminum plate, and is formed in a mesh shape by forming a number of small holes 56 by punching. As shown in the cross section, a central portion is provided with a protruding surface 49 that curves outward, and is press-formed so that an engaging portion 58 is formed around the periphery. The surface of this aluminum plate is subjected to black alumite treatment or black coating to make the whole black, thereby enhancing the aesthetic appearance.

On the other hand, the diamond cut ring 61 is a diamond cut surface formed by polishing the surface of an aluminum plate to form a glossy surface, and this is a ring fitting portion provided on the upper outer periphery of the main body case 53 as described above. The upper end surface 64 is placed on the upper end 65 of the main body case 52.
The diamond cut ring 61 is provided especially for decoration. When the frame 41 is made of resin, such a glossy surface cannot be formed on the surface thereof.
It is necessary to provide such a diamond cut ring 61. It is also conceivable to form such a glossy surface on the surface thereof by forming the frame 41 with a metal, but if it is formed into a shape having fine irregularities as described above with a metal, it would be expensive. Therefore, the diamond cut ring 61 as described above is provided for the reason that it is cheaper to use a decorative member separately.

The loudspeaker assembled in this way is shown in a plan view in FIG. 7 and a side view in FIG. Since there is a protective cover 57 having a 49 and a diamond cut ring 61 having a diamond cut surface formed on its outer periphery and having a gloss, a change in the colors of the two makes the speaker excellent in aesthetic appearance. In the illustrated embodiment, the protective cover 57 is provided with a flat plate portion 66 in which the small hole 56 is not formed, and a decorative character portion 67 indicating a manufacturer name or the like is provided in this portion by press molding or the like, and this portion is polished. It has a glossy surface to enhance the aesthetics.

[0011]

In the above-mentioned conventional speaker, a speaker having a good appearance is provided by a black protective cover 57 at the center and a diamond cut ring 61 provided around the cover. Cover 57
In addition, the diamond cut ring 61 for decoration is used as a separate member, and the number of parts increases as compared with, for example, a single protective cover.
As a result, the number of assembling steps is increased, and the number of parts management is increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a speaker protective cover which has good decorativeness, a small number of parts, is easy to assemble, and can be inexpensive.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a net-like portion having a large number of small holes, a ring-like concave portion formed on the outer periphery of the net-like portion, and an outer peripheral portion of the concave portion. A protective cover for a speaker, comprising: a decorative portion having a surface formed as a decorative surface.

[0014] Further, the outer peripheral edge of the mesh portion may be present in the concave portion, and the lower end of the concave portion may press the upper surface of the diaphragm outer peripheral support member. In addition, an aluminum plate whose surface is colored is press-formed, and the decorative portion is polished to form a diamond-cut surface.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the whole of a speaker provided with a speaker protection cover according to the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is an exploded side view. Since the audio output mechanism of this speaker is the same as the conventional one shown in FIG. 5, its detailed description is omitted.
In brief, a magnet 2 is housed in a frame 1, and yokes 3 and 4 are provided above and below the magnet 2, and an outer yoke 5 is fixed with a magnetic gap G between the yokes 3 and 4.
The outer periphery of the deformed joint 7 is fixed to the support 6 of the frame 1, and the outer periphery of the diaphragm 8 is fixed to the inner periphery of the deformed joint 7. That is, the deformed joint 7 functions as a diaphragm outer periphery support member. Coils 11, 11 are wound around the outer periphery of a bobbin 10 provided on the back surface of the diaphragm 8, and the coils 11, 11 are arranged in the magnetic gap G.
When an audio current is supplied to the coils 11, 11, the coils 11, 11 move up and down due to the action of the lines of magnetic force generated by the fixed magnet 2 and the yokes 3, 4, causing the diaphragm 8 to vibrate and perform audio output. . Reference numeral 25 denotes a damper that supports the bobbin 10 so as to be movable in the vertical direction.

A body case 12 having a locking portion 14 is locked and fixed to the outer periphery of the frame 1 having such an audio output mechanism. Is formed. The protective cover 16 that covers the upper surface of the diaphragm 8 is formed from a plate of aluminum material whose surface is treated with black anodized aluminum. The central portion of the protective cover 16 is a mesh portion 9 having a number of small holes 19 formed therein. The central portion is a protruding surface that curves forward. A ring-shaped concave portion 17 is formed around the mesh portion 9 continuously in a U-shaped groove shape, and the edge of the mesh portion 9 in which the small hole 19 is formed is located in the concave portion 17. ing. Also,
The lower end of the recess 17 presses the upper surface of the deformed joint 7 as a support member that supports the periphery of the diaphragm 8, and the deformed joint 7 fixed to the support 6 formed at the upper end of the frame 1 by bonding or the like vibrates. The depth of the concave portion 17 is set so that peeling can be prevented.

A curved decorative portion 20 is provided continuously around the outer periphery of the concave portion 17, and the surface of the decorative portion 20 is polished so that the black portion of the black alumite is shaved off and is polished so as to have a gloss. Surface. Decoration part 20
Is a ring fitting portion 1 formed on the upper outer periphery of the main body case 12.
5 is fixed by an adhesive or the like, and the surface thereof is flush with the outer peripheral surface of the main body case 12. This decoration part 2
The diamond cut surface formed on the surface of the
In addition to being formed on the entire surface of the portion located on the outer periphery of the head, for example, only the upper portion, only the lower portion, or a plurality of rings can be formed.

In the illustrated embodiment, as shown in FIG. 2, the protective cover 16 is provided with a flat plate portion 22 in which the small holes 19 are not formed. The character portion 23 is made to protrude, and the upper surface of the decorative character portion 23 is polished to a glossy surface, so that the aesthetic appearance is further improved, and the work of fixing the name plate is omitted, thereby improving the assemblability.

At the time of assembling the speaker, as shown in FIG. 4, only one protective cover 16 having the above configuration is provided on the main body case 12 fixed to the outer periphery of the frame in which the audio output mechanism is housed. By covering, as shown in FIG. 3, it is integrated, and the number of assembling steps can be reduced as compared with the conventional one shown in FIG. Further, as shown in FIGS. 2 and 3, the appearance in the assembled state includes a net-like portion 9 having a black portion at the center and a large number of small holes 19 formed therein, and a diamond-cut surface formed on the outer periphery thereof. The presence of the decorative portion 20 having a glossy appearance makes the speaker excellent in aesthetic appearance as in the related art. The protective cover 16 is not limited to black, and can be colored in various colors with the alumite treatment. Further, the coloring method is not limited to the alumite treatment, and means such as painting may be used.

Further, since the outer edge of the net-like portion 9 is located in the concave portion 17 therebetween, the shape of the small hole 19 is deformed when the concave portion 17 is drawn, so that the appearance is deteriorated. The outer edge of the net-like portion 9 is hidden in the concave portion 17, so that the protective cover 16 having a good appearance as a whole can be obtained. Further, the lower end of the concave portion 17 can be set so as to press the upper surface of the deformed joining portion 7 as a diaphragm outer periphery supporting member so that the diaphragm 8 can be reliably held. It can be used in embodiments.

[0021]

As described above, the present invention provides a net-like portion having a large number of small holes, a ring-like concave portion formed on the outer periphery of the net-like portion, and a decorative surface on the outer periphery of the concave portion. Since it is a speaker protective cover with a decorative part,
The protective part inside the speaker and the decorative part around it can be formed by one member, and at this time, the boundary between them becomes clear and the decorativeness is improved by the concave part located between them, and this concave part is provided. Thus, by positioning the outer peripheral edge of the mesh portion in the concave portion, the irregular boundary between the portion where the small hole is formed and the portion where the small hole is not formed can be made invisible from the outside. Can be improved, or various modes can be adopted such that the lower end of the concave portion can press the upper surface of the diaphragm outer periphery supporting member to reliably hold the diaphragm. .

In the case where an aluminum plate whose surface is colored by alumite treatment or the like is press-formed and the decorative portion is polished to form a diamond-cut surface, the color of the mesh portion and the gloss of the decorative portion with the diamond cut are applied. It is possible to easily manufacture a protective cover excellent in aesthetics with a clear contrast between the surface and the background (aluminum color).

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a side view of the disassembled state.

FIG. 5 is a sectional view of the conventional example.

FIG. 6 is a side view of the conventional example in a disassembled state.

FIG. 7 is a plan view of the conventional example.

FIG. 8 is a side view of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Magnet 7 Deformation joint part 8 Diaphragm 9 Net-like part 11 Coil 12 Main body case 16 Protective cover 17 Depression 19 Small hole 20 Decoration part

Claims (4)

[Claims] 1. A net-like part having a large number of small holes, a ring-shaped concave part formed on the outer periphery of the net-like part, and a decorative part formed on the outer periphery of the concave part with a surface as a decorative surface. A protective cover for a speaker. 2. The speaker protective cover according to claim 1, wherein an outer peripheral edge of the mesh portion is present in the recess. 3. The speaker protective cover according to claim 1, wherein a lower end of the recess presses an upper surface of the diaphragm outer peripheral support member. 4. The speaker protective cover according to claim 1, wherein an aluminum plate having a colored surface is press-formed, and the decorative portion is polished to form a diamond-cut surface.