JPH07111689A - Gasket for speaker - Google Patents

Abstract

PURPOSE:To provide a product whose quality is stable with less deformation owing to heat contraction, to dry adhesive at an early which radially extend on an adhesion surface adhered to a fixing member. CONSTITUTION:Since the multiple slits 18 are provided on the adhesion surface 17a of a gasket for speaker 17, the rigidity of the gasket 17 is set low, and it is softened in a circumeferential direction. The whole easily becomes flat by the flexibility. Thus, a warp does not occur in the gasket 17 at the time of adhesion, and the whole adhension surface 17a can uniformly be adhered to the outer peripheral edge 14a of an edge part 14. Adhesive gets into all the slits 18 and the adhesion area of adhesive and the gasket 17 is increased. Thus, adhesive force as against the gasket 17 is increased and the peeling of the adhesion part is impervious to occurrence. Much adhesive is supplied to the slits 18, a surface area which is brought into contact with the air is increased, and the splashing of solvent becomes easy and adhesive can be dried at the early stage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker gasket used in a speaker unit for the purpose of protecting the edge portion of a cone, the outer peripheral edge of a damper and the like.

[0002]

2. Description of the Related Art Conventionally, as a gasket for a speaker of this type, for example, there is one generally shown in FIG. The speaker gasket 1 shown in FIG. 8 is made of laminated paper in which a plurality of cardboards 1a are bonded to each other to have a thickness of about several mm. The multiple cardboards 1a are
The contact surfaces of each other are joined by adhesive,
It is formed by punching with a press machine.

As another conventional speaker gasket, for example, as shown in FIGS. 9 and 10, there is a gasket made of a molded product of rubber or elastomer. Among these, the speaker gasket 2 shown in FIG. 9 is formed in a solid shape having a quadrangular vertical cross-section, and the rigidity of the whole is set high. On the other hand, in the speaker gasket 3 shown in FIG. 10, a V groove 3a extending in the circumferential direction is provided on the adhesive surface of the gasket 2 of FIG. 9 so that the rigidity on the adhesive surface side is set low.

[0004]

However, the conventional speaker gasket having the above-mentioned structure has the following problems. That is, in the case of the laminated paper shown in FIG. 8, when the thickness is 5 mm or more, it becomes extremely difficult to cut the laminated paper vertically as the shear stress of the laminated paper increases, and a large press machine is required. Therefore, the manufacturing cost becomes high. Moreover, peeling easily occurs between the laminated cardboards 1a, and the reliability as a gasket is deteriorated.

Further, in the case of a molded article such as rubber shown in FIGS. 9 and 10, it is easy to be deformed into a shape shown by a chain double-dashed line in the figure due to shrinkage after molding. Therefore, in manufacturing the speaker unit, problems such as floating of the gasket are likely to occur, and similarly, there is a problem in that the reliability of the gasket is insufficient. In addition, there is a problem in that the solvent contained in the adhesive does not fly easily when it is bonded to the frame, which increases the number of assembly steps and is disadvantageous in terms of cost.

[0006] The present invention has been made in view of the above-mentioned conventional problems, and it is possible to obtain a product of which the deformation due to heat shrinkage is small and the quality is stable, and to quickly dry the adhesive and increase the adhesive strength. An object of the present invention is to provide a speaker gasket that can be manufactured.

[0007]

In order to solve the above-mentioned problems and to achieve the above-mentioned object, the present invention provides a speaker gasket of the present invention, for example, as shown in Figs. In the speaker gasket 17 for fixing the peripheral portion 14a of the member 13 to the fixing member 15, the adhesive surface 17a adhered to the fixing member 15 is provided with a large number of slits 18 extending in the radial direction.

The speaker gasket 17 according to the present invention may be formed by injection molding using rubber or elastomer as a material.

Further, the slit 18 of the speaker gasket 17 according to the present invention may extend linearly in the radial direction, as shown in FIG. 2, for example.

[0010]

The present invention has the above-mentioned configuration,
Since a large number of slits 18 are formed on the adhesive surface 17a, the speaker gasket 17 can be evenly and firmly adhered to the fixing member 15 via the adhesive, and the adhesive can be dried quickly. it can.

By using rubber or elastomer as the material, the speaker gasket 17 of stable quality can be obtained.

Further, by extending the slit 18 linearly in the radial direction, the speaker gasket 17 has a simple shape and can efficiently dry the adhesive.
Is obtained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a cone type speaker unit to which the present invention is applied. 2 and 3 show the speaker gasket applied to FIG.

In FIG. 1, reference numeral 5 denotes a yoke having a cylindrical cup shape, and a circuit accommodating portion 6 is formed in a concave portion of the yoke 5. The circuit housing portion 6 houses the components that make up the magnetic circuit.

In addition to the yoke 5, the components constituting this magnetic circuit include a pole 7, a magnet 8, a cancel magnet 9, a plate 10 and a voice coil 11. A ring-shaped cancel magnet 9 is fixed to the bottom surface of the yoke 5, and a cylindrical pole 7 is placed and fixed on the cancel magnet 9. The pole 7 has an outward flange portion 7 a that comes into contact with the upper surface of the cancel magnet 9, and this flange portion 7 a
A ring-shaped magnet 8 is placed and fixed on a. A ring-shaped plate 10 is placed on the magnet 8, and the outer peripheral edge of the plate 10 is joined to the inner peripheral surface of the yoke 5 on the opening side.

A narrow ring-shaped magnetic pole gap 12 is formed between the plate 10 and the pole 7, and the magnetic pole gap 12 forms a magnetic circuit together with the pole 7, the plate 10, and the like. The voice coil 1 is provided in the magnetic pole gap 12.
1 is inserted so as to be concentric with the pole 7 and the plate 10.

The voice coil 11 is a cylindrical bobbin 11a made of a material such as paper or plastic.
And a coil 11b formed of a copper wire or the like, which is wound around the outer peripheral surface of the bobbin 11a an appropriate number of times. A cone 13, which is a specific example of a vibrating member, is joined to the end of the bobbin 11a on the side opposite to the coil 11b by an adhesive to be integrally formed.

The cone 13 has a truncated cone shape,
The bobbin 11a is fitted into the hole opened on the pointed side,
An adhesive is applied to this fitting portion. Furthermore, cone 1
An edge portion 14 fixed by a fixing means such as an adhesive is integrally provided on the large diameter side of 3. Then, the ring-shaped outer peripheral edge 14 developed outside the edge portion 14
The a is fixed by an adhesive to an outer flange 15a formed on the large diameter side of the frame 15 showing a specific example of the fixing member.

The frame 15 is formed with a plurality of openings 16 for radiating sound waves rearward. The inner flange 15b formed on the smaller diameter side opposite to the outer flange 15a is placed and fixed on the plate 10. The outer flange 15a of the frame 15 serves as a damping material for the cone 13, and also serves as a speaker gasket 17 for protecting the edge portion 14 and the like.
Are fixed by a fixing means such as an adhesive.

This speaker gasket 17 is shown in FIG.
As shown in FIG. 3 and FIG. 3, the entire shape is a ring shape, and the vertical cross section is formed into a substantially quadrangular shape. And
Slits 18 radially extending in the radial direction are formed on the adhesive surface 17a of the speaker gasket 17 that contacts the outer peripheral edge 14a of the edge portion 14. The slit 18 has a V-shaped cross section, and each slit 18 extends linearly in the radial direction around a center point of the speaker gasket 17.

The shape of the slit 18 of the speaker gasket 17 is not limited to that of this embodiment, and for example, a semicircular groove may be used as the slit 19 as shown in FIG. Although not shown, it is needless to say that the groove may have a rectangular shape or other shapes. Further, the slit on the adhesive surface may be any groove that extends radially in the radial direction. For example, the center of the slit does not coincide with one point in the center of the speaker gasket 17, and the slit is centered on the circumference of an appropriate radius. There may be diagonal grooves, such as the teeth of a hypoid gear.

Rubber or elastomer can be used as the material of the speaker gasket 17.
Here, as the elastomer, for example, a high molecular substance such as styrene or olefin can be applied, but in addition to this, a substance having a high elasticity such as polyethylene or soft vinyl chloride resin is also included. Then, the speaker gasket 17 is injection-molded by an injection molding machine having a mold in which the above-described cavity is formed.

Reference numeral 20 shown in FIG. 1 is a damper. The damper 20 has a ring-shaped planar shape and a corrugated cross-sectional shape. And the damper 20
Of the voice coil 11 has an inner peripheral edge in the radial direction of
The outer peripheral edge in the radial direction is fixed to the frame 15 with an adhesive. Further, reference numeral 21 shown in FIG. 1 is a dust cap that closes the hole of the bobbin 11a. The dust cap 21 has a dome shape and is fixed to the inside of the cone 13 on the pointed side with an adhesive.

The speaker gasket 17 having the above structure is fixed to the cone 13 as follows, for example. That is, the adhesive surface 17a of the speaker gasket 17
An adhesive agent is applied to the whole of the above, and this adhesive surface 17a is overlapped and attached to the outer peripheral edge 14a of the edge portion 14 fixed to the cone 13. As a result, the speaker gasket 17 is formed integrally with the cone 13 by drying the adhesive on the bonding surface.

In this case, since a large number of slits 18 are provided on the adhesive surface 17a of the speaker gasket 17, the rigidity of the gasket 17 is set lower than that of a conventional gasket made of the same material. It becomes soft in the circumferential direction. As described above, the speaker gasket 17 is provided with flexibility, and the flexibility of the gasket 17 facilitates flattening of the whole. For this reason, the gasket 17 does not warp during bonding, and the entire bonding surface 17a can be evenly attached to the outer peripheral edge 14a of the edge portion 14.

Moreover, since the adhesive enters the inside of all the slits 18 and the contact area between the adhesive and the gasket 17 is increased, the adhesive force with respect to the gasket 17 is increased, and the peeling of the bonded portion is less likely to occur. be able to. Further, since a large amount of the adhesive is supplied to the slit 18 and the surface area in contact with the outside air is increased, the solvent contained in the adhesive can easily fly off and the adhesive can be dried early. it can. Therefore, it is possible to reduce the number of man-hours and the time required for the assembling work, to reduce the cost, and it is difficult to cause the problem such as the floating of the gasket 17 in the manufacturing as described above, so that the reliability of the gasket can be improved. it can.

5 and 6 show another embodiment of the shape of the slit. The slit 22 shown in FIG.
Is a groove extending in the radial direction formed in an inverted S shape. The shape of the groove may be, for example, an S shape in which the turning directions are opposite to each other in addition to this embodiment, and the shape of the groove is an arc shape having only one unevenness, or three or more unevennesses. It may have a wavy shape. The slit 23 shown in FIG. 6 is formed by forming a groove extending in the radial direction into a dogleg shape. As the shape of this groove, in addition to this embodiment,
For example, the shape may be upside down, and the unevenness is 2
It may be more than one place.

FIG. 7 shows another embodiment of the present invention. In the speaker gasket 24 shown in this embodiment, the gasket portion 25 and the edge portion 26 are integrally formed. The gasket portion 25 has a shape similar to that of the speaker gasket 17 of the above-described embodiment, and is integrally configured by connecting the outer peripheral edge 26a of the edge portion 26 to the inner side in the radial direction. As the material of the speaker gasket 24, rubber or elastomer can be applied as in the above embodiment.

In this embodiment, the gasket portion 25 of the speaker gasket 24 is the outer flange 1 of the frame 15.
It is directly bonded to 5a with an adhesive. Therefore, the speaker gasket 17 and the edge portion 1 in the above embodiment
4 can be eliminated, the number of assembling steps can be reduced, and the amount of adhesive used can be reduced.

As described above, the present invention is not limited to the above embodiment, but can be applied to other types of speaker units such as a dome type speaker. In this case, the vibrating member corresponds to an edge that supports the dome-shaped diaphragm from the surroundings, and the fixing member corresponds to a plate to which the outer peripheral edge of this edge is fixed. With such a configuration, the same effect as that of the above embodiment can be obtained. As described above, the present invention can be variously modified without departing from the spirit thereof.

[0031]

As described above, according to the speaker gasket of the present invention, since a large number of slits extending in the radial direction are provided on the adhesive surface, it is more rigid than the conventional gasket made of the same material. Can be lowered to make it softer in the circumferential direction, and by having such flexibility, the entire surface can easily be flattened, so that the gasket will not warp during bonding and the bonding surface It is possible to attach the whole of the whole to the fixing member evenly. Moreover, since the adhesive enters the inside of all the slits and the contact area between the adhesive and the gasket is increased, the adhesive force to the gasket can be increased, and the effect of making it difficult to cause peeling of this adhesive portion Is obtained.

Furthermore, since a large amount of adhesive is supplied to the slit portion to increase the surface area in contact with the outside air,
The solvent contained in the adhesive can be easily scattered, and the adhesive can be dried early. Therefore,
The man-hours and time required for the assembly work can be reduced, the cost can be reduced, and the floating of the gasket during manufacturing can be suppressed, so that the reliability of the gasket can be improved.

By using rubber or elastomer as the material, a speaker gasket of stable quality can be provided.

Further, by extending the slit linearly in the radial direction, it is possible to provide a speaker gasket having a simple shape and capable of efficiently and early drying the adhesive.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a cone-type speaker using a speaker gasket of the present invention.

FIG. 2 is a plan view showing a first embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of the central portion of FIG.

FIG. 4 is a side view showing another embodiment of the shape of the slit according to the present invention.

FIG. 5 is a plan view showing another embodiment of the shape of the slit.

FIG. 6 is a plan view showing still another embodiment of the shape of the slit.

FIG. 7 is a sectional view showing an essential part of a second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an example of a conventional speaker gasket.

FIG. 9 is a cross-sectional view showing another example of a conventional speaker gasket.

FIG. 10 is a sectional view showing still another example of a conventional speaker gasket.

[Explanation of symbols]

 13 Cone (Vibrating Member) 14 Edge Part 14a Outer Edge 15 Frame (Fixing Member) 17,24 Speaker Gasket 17a Adhesive Surface 18,19,22,23 Slit 25 Gasket Part 26 Edge Part 26a Outer Edge

Claims (3)

[Claims] 1. A speaker gasket for fixing a peripheral portion of a vibrating member to a fixing member, wherein a plurality of slits extending in a radial direction are provided on an adhesive surface adhered to the fixing member. gasket. 2. The speaker gasket according to claim 1, which is formed by injection molding using rubber or elastomer as a material. 3. The speaker gasket according to claim 1, wherein the slit extends linearly in the radial direction.