JPS6329351Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker system having a duct for phase inversion.

Conventionally, as this type of speaker system, those shown in FIGS. 1 and 2 are known.

In FIG. 1, a speaker unit 3, a speaker unit 4 such as a woofer, a tweeter, a duct 5 for phase inversion, etc. are attached in advance to a baffle plate 2 constituting the front surface of a cabinet 1, and this buffle plate 2 is attached in advance.
are fixed with screws 6 from the back side of the cabinet 1, which requires a large number of assembly steps and is difficult to assemble, especially for small-sized cabinets, and it is impossible to remove the grill including the Saran net 3.

FIG. 2 shows an improvement on these points, in which a duct 5 is attached in advance to the cabinet 1 which is integrated with the baffle plate 2.
A speaker unit 4 such as a woofer or a tweeter is attached from the front side with screws or the like, and a frame-shaped grille 7 to which a Saran net 3 is fixed can be attached to and removed from a hole 9 on the front side of the full board 2 by a protrusion 8 formed on its back side. It is fitted with. However, in this type of speaker system, protrusions 8 and holes 9 for removably attaching the grille 7 must be formed on the side of the grille 7 and on the front surface of the buttful plate 2, respectively, which also increases the cost due to the increased number of processing steps. was inviting.

The present invention was created in view of the above points, and aims to provide a speaker system that reduces the number of processing steps and parts for the speaker system including the grille, and reduces costs. It is characterized by being a single part that also serves as a boss for use.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 3 and 4 show embodiments of the present invention;
The figure is a sectional view taken along the line A--A in FIG. 4.

A speaker unit 4 including a tweeter and a woofer is screwed from the front to a buff-full plate 2 on the front side of the cabinet 1, as in the conventional example shown in FIG. A hole 2a and a hole 2b for forming a phase inversion duct are provided at the bottom.

The grill 7 attached to the front surface of the baffle plate 2 is a frame-shaped member with a saran net 3 attached in advance, and a first grille 7 that is removably fitted into the hole 2a.
a boss 7a, and a second boss 7b that is removably fitted into the hole 2b, and the second boss 7b has a through hole 7c and is fitted into the hole 2b to provide a phase shift of the speaker system. This constitutes a duct 5 for diversion. The grille 7 also has an integral decorative ring portion 7d at a position facing the tweeter and woofer, and is entirely formed of synthetic resin by injection molding.

Further, in the grille 7, the front ends of the first boss 7a and the second boss 7b are located rearward than the front end of the surrounding frame portion 7e, and are slightly separated from the saran net 3. Therefore, the front surface of the Saran net 3 is stretched completely flat by the frame 7e, and when the grille 7 is attached, the Saran net 3 is pressed from above the first and second bosses 7a and 7b. , the fingers touch the front ends of the first and second bosses 7a and 7b with the Saran net 3 slightly recessed, and the grille 7 can be attached to the buttful plate 2 without excessively distorting the Saran net 3. .

Further, as shown in an enlarged view in FIG. 5, the second boss 7b has a plurality of ribs 7 on its outer circumference in the axial direction of the through hole 7c.
f, and fits tightly into the hole 2b of the buttful plate 2, and a ring-shaped stepped portion is provided at the rear end of the rib 7f.
7g to form a second boss 2b for the hole 2b
The mounting position of the duct 5 is determined, and the phase reversal effect by the duct 5 is kept constant.

The present invention has been explained in detail in the embodiments above, and in particular, a boss having a through hole is formed on the grill attached to the front surface of the buttful plate, and the boss is inserted into the hole formed in the buttful plate, and the boss is inserted into the hole formed in the buttful plate. The present invention is characterized in that the grille is removably attached to the cabinet, and the through hole is used as a duct.

Therefore, the boss is connected to the duct of the speaker system and
Since it also serves as a boss for attaching the grille, the work of attaching the duct to the buttful plate in advance is omitted, simplifying the manufacture of the speaker cabinet and reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional speaker system, Fig. 2 is a partially exploded perspective view of another conventional speaker system, Fig. 3 is a sectional view of an embodiment of the present invention, and Fig. 4 is an embodiment of Fig. 3. FIG. 5 is an enlarged sectional view of the second boss of the embodiment of the present invention. 1... Cabinet, 2... Full board, 5...
...Duct, 7...Grill, 7b...Second boss,
7c...Through hole.

Claims (1)

[Scope of utility model registration request] In a speaker system in which a boss formed protruding from the rear surface of a grill is fitted into a mounting hole formed in a buttful plate on the front side of the cabinet, at least one of the holes formed in the buttful plate is used for phase inversion. The hole has a size that can be used as a duct, and a through hole is formed in the boss formed on the back side of the grille, and the outer size is formed to fit into the duct hole, and , a speaker system characterized in that the tip of the boss protrudes from the back surface of the buttful plate and is used as a duct.