JPH0999784A - Loudspeaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an outside dimension of the whole body in a condition where a grille frame is installed in an outer peripheral part of a frame by fixing the frame and the grille frame by an installing hole formed in a joining boundary part between the frame and the grille frame. SOLUTION: An installing hole 32 is formed between a projecting part 21a2 on a frame 21 and an outer frame 28e on a grille frame 28. Therefore, since there is no need to arrange an excess thickness in an outer peripheral part of the frame as before, a width dimension w1 of the projecting part 21a2 and the outer frame 28e can be reduced. A circular arc-shaped notch part is formed in the projecting part 21a2 of a part adjacent to a recessed part 21 so that a head part 29a of a screw 29 can enter. On the grille frame 28 side, an inner frame 28d does not exist in a part where the head part 29a of the screw is positioned, and the outer periphery of the head part 29a can approach the outer frame 28e. Therefore, the width dimension w1 can be set in the smallest dimension, and an outside diameter of the whole loudspeaker where the grille frame 28 is installed on the frame 21 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in a vehicle audio system or the like, and more particularly to a speaker having a grill frame provided on the outer periphery of the frame and having a reduced outer dimension.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing the structure of a conventional speaker. A frame 1 of this speaker is made of metal, and a cone-shaped diaphragm 2 is provided in the frame 1. The conical bottom portion 2a of the diaphragm 2 has an opening edge portion 1a of the frame 1 via a deformed joint portion 3 having a semi-cylindrical cross section.
Supported by. The outer circumference of the conical head 2b of the diaphragm 2 is
It is supported on the inner surface of the frame 1 via a damper plate 4. The damper plate 4 is formed of a flexible sheet made of resin fibers, a paper material, a resin film, or the like, and is formed with multiple concentric corrugations. Inner peripheral part 4 of damper plate 4
a is connected to the conical head portion 2b of the vibration plate 2 directly or via a bobbin 5 described later, and the outer peripheral portion 4b of the damper plate 4 is a.
Are fixed to the supporting step portion 1b formed on the inner surface of the frame 1 by means such as adhesion. The vibration plate 2 is supported by the deformation joint 3 and the damper plate 4 so as to be vibrable.

Voice coils C1 and C2 are wound around a bobbin 5 connected to the conical head portion 2b of the diaphragm 2. A magnetic field generator (a) is provided on the base side of the frame 1. The magnetic field generating member A includes a magnet 7, yokes 7a and 7a joined to the ends of the magnet 7, and a facing yoke 6 facing the yokes 7a and 7a. York 7a, 7a
The voice coil C in the gap between the opposite yoke 6 and
1 and C2 are located.

When the above speaker is attached to a support base material 10 such as a door in a vehicle, there is a case where a grill 11 is attached to cover a sounding part in front of the frame 1. FIG. 5 shows a mounting structure using a conventional grill frame 8 that supports the grill 11.

A mounting hole 1c is formed in an opening edge 1a on the sounding side of the frame 1. In addition, the opening edge portion 1 of the speaker
A ring-shaped grill frame 8 is fitted around the outer periphery of a.
Ribs 8c protruding toward the center of the ring are integrally formed on the grille frame 8, and mounting holes 8a are formed at a plurality of locations on the ribs 8c.
Has been drilled. The frame 1 and the grille frame 8 are fitted to each other such that the opening edge portion 1a overlaps the rib 8c in the Z direction. The central portion of the frame 1 is the support base material 10
The frame 1 is inserted into the circular hole formed in
The opening edge portion 1a and the grill frame 8 are installed on the front surface (the upper surface in the drawing) of the support base material 10. The screw 9 is commonly inserted into the mounting hole 1c of the frame 1 and the mounting hole 8a of the grille frame 8 and is screwed to the support base material 10, and the frame 9 and the grille frame 8 are fastened together by the screw 9. Fixed.

A groove 8b is formed on the surface of the grill frame 8 so as to extend along the grill frame 8, and the groove 8b is formed in the groove 8b.
A protective grill 11 covering the entire sounding side of the speaker is fitted and attached. The grill 11 is composed of a so-called punching net in which thin plates are punched in a mesh shape.

[0007]

In the conventional speaker shown in FIG. 5, the mounting hole 1c is formed in the opening edge 1a of the frame 1 as described above. Therefore, in the opening edge portion 1a of the frame 1, a surplus wall dimension d0 is required between the hole inner peripheral surface of the mounting hole 1c and the frame outer peripheral surface 1d, and this surplus wall dimension d0 determines the strength of this surplus portion. In order to keep it, it is necessary that the wall thickness exceeds a certain value.

Also, the grille frame 8 fitted to the outer peripheral surface 1d of the frame 1 has a width dimension d1 of a certain value or more in order to surely hold the grille 11 and in terms of strength. It is necessary.

Therefore, the substantial width dimension w0 of the opening edge portion including the frame 1 and the grille frame 8 becomes very large, and the diameter dimension of the entire speaker becomes large. For a vehicle-mounted speaker or the like, there is a demand for a small-sized, lightweight and excellent sound quality while maintaining a sounding area (outer diameter dimension of the diaphragm 2). When the grille frame 8 is mounted as shown in FIG. A structure with an increased size is not suitable for the above size reduction.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a speaker in which the overall outer dimensions can be reduced with the grill frame attached to the outer peripheral portion of the frame.

[0011]

A speaker according to the present invention includes a frame for supporting a diaphragm, a grill frame fitted to the outer peripheral portion of the frame on the sounding side, and a sounding unit mounted on the grill frame. A grill for covering is provided, and a mounting hole surrounded by both the frame and the grill frame is formed at a joint boundary portion between the frame and the grill frame, and the frame and the grill frame are fixed by the mounting hole. It is characterized by that.

In the above structure, the outer edge portion of the frame and the grille frame are formed with the concave and convex fitting portions to be fitted to each other, and the mounting hole is formed in the joint boundary portion between the projection and the concave portion of the concave and convex fitting. It is preferable.

According to the present invention, a mounting hole surrounded by the frame and the grill frame is formed, and is fixed to a supporting base material such as a vehicle by a screw inserted in the mounting hole. Since the mounting holes are formed so as to extend over both members of the frame and the grille frame, the frame 1 has a thickness d0 as in the conventional example shown in FIG.
It is not necessary to form a surplus portion of the grill, and this surplus dimension is shared by the grill frame side. Therefore, the outer dimensions of the combined frame and grill are reduced.
Further, since the mounting hole is formed so as to straddle the frame and the grill frame, both the frame and the grill frame can be reliably fixed to the support base material by the screw inserted in the mounting hole.

Further, it is preferable that the frame and the grill frame are fitted to each other and attached in a state of being combined in the axial direction (Z direction). Furthermore, it is preferable to form a mounting hole at the joint boundary portion between the protruding piece and the concave portion in the concave and convex fitting portion between the frame and the grill frame. In this structure,
In the state where the frame and the grill frame are combined, the mounting hole forming portions on the frame side and the grill frame side do not shift in position from each other, and the mounting hole can be always formed at the boundary between the frame and the grill frame.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the overall structure of the speaker of the present invention attached to a support base material, and FIG.
(A) is a plan view showing the speaker frame from the sounding side,
2B is a sectional view taken along the line A-O-B in FIG.
FIG. 3A is a plan view showing the grille frame from the sounding side, FIG. 3B.
3A is a cross-sectional view taken along the line A-O-B in FIG. 3A, FIG. 4A is a partial perspective view showing an outer peripheral portion of the frame, and FIG. 4B is a plan view thereof.

In the speaker shown in FIG. 1, a base frame 20 made of a light metal alloy is combined with a base of a frame 21 made of synthetic resin. The frame 21
Inside, a cone-shaped diaphragm 22 is provided. The edge of the cone bottom 22a of the diaphragm 22 is joined to the joint 21a3 of the opening edge 21a of the frame 21 via the deformation joint 23, and The outer circumference of the conical head 22b of 22 is the center line O
It is fixed to the support portion 21b of the frame 21 via a damper plate 24 having multiple wavy deformation portions in a concentric circle centered at -O. A cylindrical bobbin 15 is joined to the diaphragm 22, and voice coils C1 and C2 are wound around the bobbin 15. A magnetic field generator (a) is held in the base frame 20. Magnetic field generator (a)
Is an opposing yoke 26 located on the inner peripheral side of the bobbin 15,
The support yoke 27 located on the outer peripheral side, and a pair of ring-shaped magnets 27a, 27a held on the inner peripheral surface of the support yoke 27.
And The voice coil C is provided in the facing gap between the ring-shaped magnets 27a, 27a and the facing yoke 26.
1, C2 are located.

As shown in FIGS. 2 and 4, the frame 2
The first opening edge portion 21a is integrally formed in a stepped shape, and the rib 21a1, the convex portion 21a2,
It is the joint portion 21a3. On the rib 21a1, there is formed a semicircular or U-shaped recess 21c which is partially cut off in the outer peripheral direction.
Are formed at a plurality of locations. In the frame 21 shown in FIG. 2A, eight recesses 21c are formed on the rib 21a1 of the opening edge 21a. As shown in FIG. 1, the outer peripheral portion of the deformed joint portion 23 is adhesively fixed to the upper surface of the joint portion 21a3. The convex portion 21a2 is formed so as to be one step higher, and the outer peripheral portion of the deformable joint portion 23 can be positioned by the inner peripheral surface thereof. Further, as shown in FIG. 4A, the outermost rib 21a1 is formed with step projections 21d projecting downward in the Z direction on both sides of the recess 21c.

The ring-shaped grille frame 28 shown in FIG. 3 is made of the same resin material as the frame 21.
Alternatively, the frame 21 and the grill frame 28 may be die-cast molded from an aluminum alloy, a zinc alloy, or the like. In the grille frame 28 shown in FIG. 3, reference numeral 28a is a protrusion, 28b is a groove for fitting the grille, 28c is a holding rib, 28e is an outer frame, and 28d is an inner frame. The groove 28b for fitting the grill is formed between the outer frame 28e and the inner frame 28d.

As shown in FIGS. 4 (a) and 4 (b), a concave inner wall surface 28a1 forming a part of the mounting hole 32 is formed at the tip of the projecting piece 28a, and both sides of the projecting piece 28a are formed. Are formed with fitting recesses 28a2, 28a2 into which the step projections 21d are fitted. As shown in FIGS. 1 and 4, when the speaker is attached to the door of the automobile or other parts, the grill frame 28 is fitted around the opening edge 21a of the frame 21. As shown in FIG. 4A, the speaker frame 21 is inserted into the inner peripheral portion of the grille frame 28 from above the Z axis. At this time, as shown in FIG.
The projecting pieces 28a are inserted into and fitted into the substantially semicircular or U-shaped recess 21c, and at the same time, the step projecting portions 21d and 21d formed on the frame 21 are the projecting pieces 2 of the grille frame 28.
The fitting recesses 28a2, 28a2 located on both sides of 8a are fitted.

Further, the rib 21a1 of the frame 21 is placed on the holding rib 28c of the grill frame 28. As a result, the frame 21 and the grill frame 28 are positioned in the Z direction. Also, with the step projection 21d fitted in the fitting recess 28a2, the projection 28a
Since the recess 21c and the recess 21c are fitted to each other, the frame 21 and the grill frame 28 can be easily positioned. And the step protrusion 21d
The fitting of the fitting recesses 28a2 with each other prevents the frame 21 and the grill frame 28 from being displaced in the circumferential direction.

The frame 21 and the grill frame 28 are fitted to each other, that is, the recess 21c and the projecting piece 28a.
With the inner wall surface of the recess 21c and the protrusion 28
A mounting hole 32 surrounded by the inner wall surface 28a1 at the tip of a is formed. The mounting hole 32 is substantially circular. Protrusion 28
The inner wall surface 28a1 of the front end of a is formed in a concave shape and preferably has an arc shape, but it may be a curved surface other than the arc, or may be a flat surface.

With the grille frame 28 fitted to the outer periphery of the frame 21, a mounting screw 29 is inserted into the mounting hole 32 and is fastened to the vehicle-side supporting base material 30. At this time, the head portion 29a of the mounting screw 29 straddles the frame 21 and the grill 28, and the head portion 29a of the screw contacts the upper surface of the rib 21a1 of the frame 21 and the upper surface of the protruding piece 28a of the grill frame 28. Since they are on the same plane, both the frame 21 and the grill frame 28 are reliably pressed and fixed by the support base material 30 by the head portion 29a. Frame 2
1 and the grill frame 28 are attached to the support base material 30, the outer periphery of the grill 31, which is a punching net, is fitted into the groove 28b of the grill frame 28, and the grill 31 covers the sounding portion of the speaker. Be seen.

In this speaker, the mounting holes 32 are formed by the protrusions 21a2 on the frame 21 and the outer frame 2 on the grille frame 28.
Formed during 8e. Therefore, unlike the conventional example shown in FIG. 5, it is not necessary to provide the extra thickness d0 on the outer peripheral portion of the frame, and the width dimension w1 of the convex portion 21a2 and the outer frame 28e can be reduced. Further, in the convex portion 21a2 adjacent to the concave portion 21c, an arcuate notch 21a4 is formed so that the head portion 29a of the screw 29 can be inserted. Further, on the side of the grill frame 28, there is no inner frame 28d at the portion where the head portion 29a of the screw is located, and the outer circumference of the head portion 29a can approach the outer frame 28e. From this, the width dimension w1 can be minimized, and the grille frame 2 can be attached to the frame 21.
It is possible to reduce the outer diameter of the entire speaker to which 8 is attached. That is, when a speaker having the same opening diameter as the conventional one is used, the speaker constructed according to the present invention can have a smaller overall outer diameter.

[0024]

According to the present invention, the outer dimensions of the entire speaker can be reduced with the grill frame attached to the outer periphery of the frame. Also, the frame and the grill frame can be securely fixed with screws, and the grill can be mounted as usual.

When the mounting hole is formed in the concave and convex fitting portion between the frame and the grill frame, the mounting hole is immediately formed when the frame and the grill frame are assembled. Therefore, the frame and the grill frame do not shift.

[Brief description of drawings]

FIG. 1 is a sectional view showing the overall structure of a speaker of the present invention in which a grill frame is combined with a frame.

FIG. 2A is a plan view showing a frame of a speaker,
(B) is a cross-sectional view taken along the line A-O-B in (a),

3A is a plan view showing a grille frame, FIG. 3B is a cross-sectional view taken along the line A-O-B in FIG.

4A is a partial perspective view showing a combination of a frame and a grill frame, FIG. 4B is a partial plan view, FIG.

FIG. 5 is a cross-sectional view showing a conventional speaker in which a grill frame is combined with a frame.

[Explanation of symbols]

 21 Frame 21a Opening Edge 21a1 Rib 21a2 Convex 21a3 Joint 21c Recess 28 Grill Frame 28a Projection 28b Groove 28c Retaining Rib 28d Inner Frame 28e Outer Frame 29 Mounting Screw 30 Support Base Material 31 Grill 32 Mounting Hole

Claims (2)

[Claims] 1. A frame for supporting a diaphragm, a grille frame fitted to an outer peripheral portion of the frame on the sounding side, and a grill mounted on the grille frame to cover the sounding unit. A speaker characterized in that a mounting hole surrounded by both the frame and the grill frame is formed at a joint boundary portion with the grill frame, and the frame and the grill frame are fixed by the mounting hole. 2. An outer peripheral portion of the frame and a grille frame are provided with concave-convex fitting portions that fit with each other, and mounting holes are formed at a joint boundary portion between the projection and the concave portion of the concave-convex fitting. The described speaker.