JP2577595Y2 - Composite speaker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite speaker in which a plurality of speakers are integrated, and more particularly, to a composite speaker suitable for use in a vehicle.

[0002]

2. Description of the Related Art Generally, in a vehicle speaker,
In order to effectively use a narrow space such as a door portion and a rear tray portion of a car, a so-called coaxial type composite speaker in which a tweeter or a squawker is disposed using a support member on the front of a corn woofer is often used.
Among them, a composite type in which a support member made of resin or the like is attached to the center of a woofer magnetic circuit and a tweeter constituted by an inner magnetic circuit is set on the support member is known.

In this case, a tweeter unit which can be mounted with one touch has already been proposed by the present applicant as Japanese Utility Model Laid-Open No. 1-175095. FIG.
Shows a cross section of the composite speaker. That is, in FIG. 4, reference numeral 21 denotes a woofer unit. The woofer unit 21 is provided with a woofer yoke 22 having a center pole 22a, a ring-shaped magnet 23 provided on the woofer yoke 22, and an upper portion thereof. Plate 2
4, and a plate-shaped frame 26 is provided on the plate 24. A diaphragm 27 is provided inside the frame 26. The diaphragm 27 is supported via an edge 28, dampers 29, 30 and the like, and has a central portion within a magnetic gap between the plate 24 and the center pole 22a. The provided voice coil 31 is coupled and can vibrate. A stepped through hole 22b for attaching a synthetic resin support member 32 to which the tweeter unit 33 is mounted is formed in the center of the yoke 22 above the center pole 22a.

[0004]

In the above-described composite speaker, the mounting member 32a of the support member 32 of the tweeter unit 13 is fitted into the through hole 22b of the woofer unit 21. In this case, the integration of the two is completed, and the assembling operation is extremely simple. However, the support member 32 is only held by fitting the upper part of the center pole 22a of the yoke 22 only.
The connection between the support member 32 and the woofer unit largely depends only on the engagement of the claw 32b formed at the tip of the attachment member 32a, and as a result, there is a problem that the two cannot be reliably and firmly integrated. Was.

[0005] This invention has been proposed in view of the above, and the object thereof is that the assembling is simple and the support member of the tweeter unit can be securely and firmly attached to the woofer unit. It is another object of the present invention to provide a composite speaker as described above.

[0006]

In order to achieve the above object, a tweeter unit 33A is attached to a center pole 1 of a yoke 2 of a woofer unit 20 by a support member 4.
In the composite speaker mounted by way of the center pole 1 of the yoke 2 of the woofer unit 20,
Has a through-hole 3 along the axis, and the through-hole 3 has counterbore steps 3a, 3b in the outer peripheral direction at upper and lower openings.
Is formed, and the support member 4 has a fitting portion fitted into the through hole 3, and the fitting portion is formed in a counterbore step portion 3 a at an open end above the through hole 3 of the center pole 1. It has a projection 4c to be fitted, and a claw 5b engaged with a counterbore step 3b at the lower opening end of the through hole 3 on the yoke side. The claw 5b has a slot 5c and is inserted therethrough. A locking member 5 which can be opened outward by a head 6a of a screw 6 or a washer.
Is formed at the tip portion of the.

[0007]

When the tweeter units 33A and 33 are mounted on the woofer unit 20, two locations, ie, the upper and lower portions of the center pole 1 of the yoke 2 of the woofer unit 20, that is, the counterbore steps 3a formed above and below the center pole 1 are provided.
Since the support member 32 of the tweeter unit 23 is supported by 3b, the holding of the tweeter unit 23 is stable.

When the tweeter units 33A and 33 are mounted, similarly to Japanese Utility Model Laid-Open No. 1-175095 proposed by the present applicant, there is no need to lie the woofer unit 20 down, and the support member 32 is attached from the front side of the speaker. It is simply inserted into the through hole of the center pole 1 of the yoke 2 and is held at two locations of the counterbore steps 3a and 3b, so that workability is good.

In the present invention, since the through-hole 3 of the center pole 1 of the yoke 2 can be set to a size capable of being punched out by a press, no cutting work is required in the manufacture of the yoke 2, and the yoke 2 can be manufactured using only a press work, thereby reducing costs. Inexpensively can be made.

A long screw 6 is inserted from the lower side of the through hole, and its head 6a or washer W is used to split the slot 5.
The latching member 5 having c is pushed out so that the claw 5b is securely engaged with the counterbore step 3b. Since the screwing is not at the center pole of the yoke 2 of the woofer unit 20, it is possible to prevent the iron powder from entering the gap, so that abnormal noise is unlikely to occur. Also, there is no need to cut a tap in the hole formed in the center pole 1 of the yoke 2,
There is no increase in cost.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. In this figure, the same members as those of the conventional example shown in FIG. First, a woofer unit indicated by reference numeral 20 has a center pole 1 at the center of a yoke 2, a relatively large through-hole 3 penetrating the center of the yoke 2, and a top plate of the through-hole 3. A counterbore 3a is formed on the outer peripheral side of the opening on the side, and a tapered counterbore 3b is formed on the opposite end, below the lower opening on the yoke 2 side.

The support member 4 on the side of the tweeter unit 33A of the external magnetic type attached to the woofer unit 20 has a cylindrical main body 4a, and has a bottom plate at the end to be closed with a bottomed cylindrical shape. A projection 4c is formed on the outer periphery of the bottom plate 4b as a fitting portion fitted to the counterbore step 3a.

A cylindrical locking member 5 is integrally formed with the protruding portion 4c as a fitting portion. The cylindrical locking member 5 is formed at a lower portion in the axial direction. A hole 5a is formed, and a hook-like claw 5b for catching the counterbore step 3b is formed on the outer periphery of the lower end, and the lower end of the claw 5b is dimensioned so as not to protrude from the end face of the yoke 2. I have.

In this case, the support member 4 is made of, for example, a synthetic resin, and the substantially cylindrical locking member 5 is also a resin, and has elasticity due to its material. The locking member 5 has, for example, a slit 5c formed in a cross shape when viewed from a plane.

For this reason, in assembling, when the locking member 5 of the support member 4 is inserted into the through hole 3 from the front side without lowering the woofer unit 20, the locking member 5 has elasticity, and Since the slit 5c is provided, the tip of the claw 5b is bent inward and passes through the through hole 3 and reaches the counterbore 3b. When the counterbore 3b is reached, the claw 5b is opened, and the upper wall of the counterbore 3b and the claw are formed. 5b can be engaged with the support member 4 and thus the tweeter unit 33A. An end of the support member 4 opposite to the bottom plate 4b, that is, the main body 4a is in an open state, and a flange 4 for stably mounting the tweeter unit 23 is provided on an outer peripheral portion thereof.
d is formed.

Further, a cylindrical portion 4e through which the screw 6 is inserted from below the yoke 2 of the woofer unit 20 is formed at the center of the support member 4. In this embodiment, the yoke 2
The screw 6 is inserted into the through-hole 5a of the locking portion 5 from the bottom side of the screw 6 and the head 6a of the screw 6 is rotated to screw the tip of the screw 6 to the bottom of the yoke of the tweeter unit 23. . Therefore, the screw 6 is inserted into the hole 5a and the cylindrical portion 4e and tightened, and the locking member 5 having the slit 5c is pushed outward as the large-diameter head 6a enters the tapered hole 5a. Since the claw 5b is spread, the claw 5b can be reliably engaged with the lower counterbore step 3b, and the tweeter unit 33A can be reliably and firmly integrated. If the washer W having a large diameter is appropriately provided in the portion of the head 6a, the locking member 5 can be pushed further outward by the washer W.

Note that the screwed portion is the woofer unit 2
It is away from the gap of the magnetic circuit on the zero side,
Since it is inside the cylindrical portion 4e inside the main body 4a of the support member 4, iron powder that may be generated at the time of screwing work does not enter the gap portion. For this reason, it is possible to prevent abnormal sound from being generated. Further, the through hole 5a is a mere hole, does not require tapping, and does not particularly increase the cost.

FIG. 2 shows a second embodiment of the present invention of a composite speaker having a support member 4 suitable for mounting a tweeter unit 33 having an inner-magnet type magnetic circuit. The cylindrical portion 4e is omitted because it can be fitted to the first portion. The other configuration is the same as that of the first embodiment, and the description is omitted.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, in the second embodiment, a positioning projection 7a is provided on a rotary table 7 on an assembly line on which a speaker in which a tweeter unit 33 is incorporated in a woofer unit 20 is mounted, and the projection 7a is supported. It is characterized in that it is fitted in the through hole 5a of the engaging member 5 of the member 4. By doing so, there is an advantage that the conveyance of the speaker on the assembly line is stabilized and the work of assembling other members is facilitated. The other configuration is the same as that of the first embodiment, and a description thereof will be omitted.

[0020]

[Effect of the Invention] As is clear from the above description, the composite speaker of the present invention has a protrusion at the one end of the center pole of the magnetic circuit of the woofer unit only by inserting the support member from the front of the woofer unit. The engagement of the counterbore step portion and the engagement of the claw of the locking member expanded by the head of the screw or the washer at the other end,
In addition, since the screws are used, the bonding force between the support member to which the tweeter unit is attached and the woofer unit is large, and both can be reliably and firmly integrated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a composite speaker according to a first embodiment of the present invention;

FIG. 2 is a longitudinal sectional view showing a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a third embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center pole 2 Yoke 3 Through-hole 3a Counterbore 3b Counterbore 4 Support member 4a Main body 4b Bottom plate 4c Projection 4e Cylindrical part 5 Locking member 5a Through-hole 5b Claw 6 Screw 6a Head W Washer

Claims (1)

(57) [Scope of request for utility model registration] 1. A composite speaker comprising a tweeter unit 33A mounted on a center pole 1 of a yoke 2 of a woofer unit 20 via a support member 4.
The center pole 1 of the yoke 2 of the woofer unit 20 has a through-hole 3 along the axis, and the through-hole 3 has counterbore steps 3a, 3
b is formed, and the support member 4 is provided in the through hole 3.
And a projection 4c fitted into a counterbore 3a at an open end above the through hole 3 of the center pole 1, and a yoke side of the through hole 3. And a claw 5b engaged with a counterbore step 3b at an open end below the claw 5b. The claw 5b has a slit 5c and is expanded outward by a head 6a or a washer W of a screw 6 to be inserted. A composite speaker formed at the tip of an openable locking member.