JPS6342631Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a composite speaker in which a support member for arranging at least one treble speaker in front of a diaphragm of a bass speaker is improved.

Conventionally, composite speakers in which at least one high-frequency speaker is arranged in front of a diaphragm of a low-frequency speaker are often used, and because they require a small installation space, they have been particularly adopted as in-vehicle speakers.

In the composite speaker, the treble speaker can be arranged as described above by means of a supporting member connected to the center pole of the bass speaker, and by means of a supporting member connected to the center pole of the bass speaker 1, as shown in FIG. It can be broadly divided into structures in which a high-pitched speaker 3 is arranged by a support member 2 bridging the periphery.

In the former structure, processing is required for the center pole of the bass speaker, and a dustproof structure is required between the support material and the diaphragm, whereas in the latter structure, the frame 1a of the bass speaker is required.
Since it is sufficient to drill a mounting hole on the outer periphery of the bass speaker 1, there is an advantage that processing of the bass speaker 1 can be minimized.

In this latter type of composite speaker,
In order to make the radiation axes of the bass speaker and the treble speaker different, a support member 21 formed in a chevron shape as shown in FIG. 2 is used.

When such a speaker is used as an in-vehicle speaker, the radiation axis of the high-pitched speaker 3 attached to one slope 21a of the chevron-shaped support member 21 is directed toward the listener, and the sound is radiated directly.
On the other hand, a treble speaker attached to the other slope 21b of the support member 21 is arranged so that its radiation axis faces the rear window glass, and the radiated sound is reflected by the rear window glass to generate articulatory sound, which can be heard along with the direct sound. This has the effect of increasing the sense of realism.

By the way, in the composite speaker shown in FIG. 2, when the support member 21 is obtained by punching and bending a metal plate, the speaker mounting bosses, pins, etc. cannot be integrally molded, so the mounting brackets (screws) are not required. , screws, nuts, etc.), and furthermore, a protective grill for protecting the opening of the speaker 3 must be molded as a separate member.

Moreover, such sheet metal processing lacks a three-dimensional effect and cannot increase the commercial value.

On the other hand, in synthetic resin molded products, the mounting bosses and pins may be integrally molded, but when molded into a mountain shape like this, the mounting bosses and pins must be formed at right angles to the slope. This is not possible in normal molding because the axial directions of the bosses or pins on the respective slopes 21a and 21b intersect, and the directions in which the bosses or pins of the molds in molding intersect.

Although it is possible to do this by using a molding machine that uses a special mold, it has the disadvantage that the mold becomes extremely complicated and the price of the molded product increases.

Furthermore, in common with the metal plate support member, when installing speakers on both slopes of the chevron-shaped support member 21, the mounting direction of parts such as mounting screws is different on each slope, which increases the number of man-hours and complicates the process. Furthermore, since it is necessary to ensure that the other speaker is not located on the mounting axis of the mounting screw of one speaker, the dimensions of each speaker are also limited.

Therefore, in this idea, by molding,
A substantially flat support member is formed with a groove formed in a portion located at the crease of the chevron, and after the speaker is attached, the support member is bent along the groove to form a chevron, and this is attached to the periphery of the frame of the bass speaker. By bridging the parts, the disadvantages of the above-mentioned conventional example are solved, and the following embodiments will be described in more detail.

In FIGS. 3 to 5, reference numeral 31 is a supporting member made of ABS resin formed by molding or the like and is formed into a substantially flat shape.

31a and 31b are openings to which the first and second speakers 51 and 52 are to be attached, respectively, 31c is an attachment boss into which the attachment screw of the first speaker 51 is screwed, and 31d is an opening for attaching the second speaker 52. After the mounting pin 31d is inserted into the frame mounting hole of the second speaker 52, it is thermally melted and attached to the second speaker 52.
to be fixed.

The mounting boss 31c and the mounting pin 31d have a structure for mounting a first speaker that uses an electrodynamic spooker, which is relatively heavy, whereas the latter is a structure for mounting a first speaker that uses a comparatively heavy electrodynamic spooker, whereas the latter is a structure that is used for mounting a relatively light piezoelectric speaker. The only difference is that the structure is for attaching a second speaker employing the above structure, and the structure may be selected appropriately taking into consideration the type and weight of the speaker to be employed.

31e is a triangular groove provided between the openings 31a and 31b of the support member 31, and 31f, 31g
are triangular protrusions provided in contact with the ends of the triangular grooves, and their opposing surfaces support the support member 31 in the triangular groove 31e.
It is designed so that it will touch when bent along.

Further, as shown in FIG. 4, a small protrusion 311g may be formed on the triangular protrusion 31g, and a recess 311f in which the small protrusion 311g engages may be formed on the triangular protrusion 31f.

Then, the support member 31 is accurately bent at a predetermined angle due to the contact between the triangular projections 31g and 31f.

Furthermore, the engagement between the small protrusions 311g and the recesses 311f not only prevents the bent portion from being deformed in the torsional direction, but also has the effect of increasing the adhesive surface when the triangular protrusions 31f and 31g are adhesively fixed.

Further, reference numerals 31h and 31i denote support legs formed at the four corners of the support member 31, which serve as mounting parts for the bass speaker 1 and have holes in which screws 53 inserted through the frame 1a of the bass speaker 1 are screwed. , and the support legs 31h, 31i are inclined outward at a predetermined angle so as to be substantially perpendicular to the contact surface of the frame 1a when the support member 31 is bent into a chevron shape along the triangular groove 31e. are doing.

First, the first speaker 51 is placed in the opening 31a of the support member 31 having such a structure, and is fixed to the mounting boss 31c with screws, etc., and then the second speaker 52 is melt-welded with the mounting pin 31d using a soldering iron or the like. After fixing, the support member 31 is bent into a chevron shape along the triangular groove 31e so that the triangular protrusions 31f and 31g are in contact with each other, and then the frame of the bass speaker 1 is fixed as shown in FIG. The support member 31 is attached to the frame 1a of the bass speaker 1 by screwing the screw 53 inserted through the through hole 1b formed on the periphery into the hole formed in the support legs 31h and 31i.
bridge the periphery of

In addition, if necessary, apply adhesive to arbitrary contact surfaces of the triangular groove 31e and the triangular protrusions 31f and 31g or the small protrusion 311g and the recess 311f,
The part may be fixed with adhesive.

According to such a configuration, since the mounting boss 31c and the mounting pin 31a are formed into a flat shape, the axial directions of the mounting boss 31c and the mounting pin 31a are aligned, so that conventional molding can be applied.

Note that the support legs 31i and 31h are attached to the mounting bosses 31.
Since the exit direction is outward with respect to c, etc., normal molding is possible.

Further, the support legs 31i, 31h may be formed at right angles to the support member 31, in which case the support legs 31i, 31h may be formed at right angles to the support member 31.
The bottom surface of the support leg portion 31 is sloped so that the bottom surface that is the mounting surface of the bass speaker 1 to the frame 1a becomes parallel to the mounting surface of the bass speaker frame 1a when the support member 31 is bent. That's fine.

Therefore, the mounting members 31c, 31d and the support legs 31h, 31 are formed by a normal molding method.
Since parts such as i can be integrally molded, only screws are required for installation, which greatly reduces the number of parts and makes parts management extremely easy.
Furthermore, parts that also serve as decoration, such as a protective grill, can be integrally molded.

Furthermore, since the work of attaching the first speaker and the second speaker is carried out before the support member 31 is bent, it is necessary to use a screwdriver to tighten the first speaker's attaching screw and a soldering iron to melt the second speaker attaching pin. Since the pushing directions are the same, it is possible to work without being interfered with by the other speaker, and work errors (defects in tightening) are less likely to occur, which is advantageous in terms of quality control.

Further, the first and second speakers are supported by a support member 31.
Since the size of the speakers is such that they do not come into contact with each other when folded, this has the advantage of increasing the degree of freedom in selecting speakers.

Furthermore, when forming a pot stamp or the like on the outer periphery of the openings 31a, 31b from a design point of view, it is possible to form a flat shape, so a plurality of hot stamps can be stamped at one time.

Although this invention has been described as an example of a support member that supports two speakers 51 and 52, the number of speakers can be freely selected according to the design, and polypropylene may also be used as the material for the support member. or other synthetic resin materials whose bent portions do not break even after being bent several times can be used.

Furthermore, the triangular protrusions 31f and 31g are for making the angle of the bent portion accurate and for reinforcing the strength of the bent portion, and may be omitted if necessary.

Further, the second speaker 52 may be provided as necessary, but even if the second speaker is not provided, molding is extremely simple.
The effect of this invention of reducing the number of parts can be achieved.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of a conventional composite speaker, Figure 3 is a perspective view of an embodiment of a support member used in the composite speaker of this invention, and Figure 4 is an enlarged view of the main parts of another embodiment. FIG. 5 is a perspective view showing the assembly of a composite speaker according to an embodiment of this invention. 1 is a bass speaker, 1a is a frame, 31
31a is a support member, 31a is an opening, 31c is a mounting boss, 31a is a mounting pin, 31i and 31h are mounting portions, and 31e is a triangular groove.

Claims (1)

[Scope of utility model registration request] Since the bass speaker 1, at least one treble speaker, and the treble speaker are arranged in front of the diaphragm of the bass speaker 1, the treble speaker is attached to the periphery of the frame 1a of the bass speaker 1. In a composite speaker having a bridged support member, the support member 31 is a synthetic resin molded product, and includes an opening 31a, a mounting boss 31c, or a mounting pin 31d for mounting at least one treble speaker 51. , attachment part 31i to bass speaker 1,
31h and the triangular groove 31e are integrally molded, and the supporting member 31 is bent into a chevron shape along the triangular groove 31e and is attached to the periphery of the frame 1a of the bass speaker 1 at the attachment parts 31i and 31h. A composite speaker characterized by: