JP2543231Y2 - Speaker Duct Structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a structure of a speaker duct.

[0002]

2. Description of the Related Art Conventionally, as a structure of a speaker duct, for example, a structure as shown in FIG. 5 is known.

In FIG. 1, reference numeral 1 denotes a speaker enclosure (hereinafter referred to as an enclosure), 2 denotes a duct made of resin press-fitted into a hole 1a of the enclosure 1, and 2a denotes a duct 2
2b are ribs provided outside the main body 2a of the duct 2 and in the longitudinal direction of the duct 2, and 3 is a paper tube fixed to an end of the duct 2 with an adhesive 4. Length L of tube 3
By changing ₁ , a predetermined bass reproduction characteristic can be obtained for a plurality of types of enclosures having different volumes.

[0004]

However, the above-mentioned prior art has the following problems.

The work of connecting the paper tube 3 is performed after the duct 2 is press-fitted into the enclosure 1, so that the workability is poor.

[0006] Since the work is performed according to the above-described procedure, the length L _{2 of the} duct ₂ becomes large, and thus the cost increases.

[0007] Since a step is formed at the joint between the duct 2 and the paper tube 3, the flow of air is disturbed, and a so-called wind noise is generated.

The present invention has been made in view of the above points, and an object of the present invention is to provide a speaker duct structure which eliminates the disadvantages of the prior art.

[0009]

According to the present invention, there is provided a speaker duct having a resin duct and a paper duct connected to the rear of the duct. A flange portion exposed to the outside, a plurality of ribs extending in the longitudinal direction in a divided manner on the outer periphery are formed so as to protrude from the rear end of the duct, and the inner diameter of the protruding rib has an inner diameter. A paper tube corresponding to the inner diameter of the duct is fixed, and is pressed into the mounting hole of the enclosure with the rib.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structure of a speaker duct according to the present invention will be described with reference to FIGS. 1 is a sectional view of a duct assembled to an enclosure, FIG. 2 is a rear view of the duct, and FIGS. 3 and 4 are sectional views showing another embodiment of the present invention.

The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, 5 is a duct made of the resin of the present invention, 5a is a main body of the duct 5, 5b is a rib provided outside the main body 5a of the duct 5 and in the longitudinal direction of the duct 5, The end 5c of the rib 5b has a structure protruding from the end face 5d of the main body 5a.

A paper tube 3 formed to a predetermined length in advance is fixed to an inner portion of the end 5c.

To assemble the duct 5 into the enclosure 1, first fix the paper tube 3 to the duct 5 and then press-fit the duct 5 into the hole 1 a of the enclosure 1 to assemble the duct 5 into the enclosure. Complete. At this time, since the rib 5b bites into the hole 1a, the duct 5 is firmly fixed only by press-fitting.

FIGS. 3 and 4 show another embodiment of the present invention. In FIG. 3, the length A of the main body 5a of the duct 5 is smaller than the thickness t of the enclosure 1.

In this case, since the rib 5b presses the paper tube 3 with an appropriate force, no adhesive is required.

FIG. 4 shows a configuration in which a convex portion 5e is formed on an end face 5d of the duct 5, and the paper tube 3 is sandwiched between the convex portion 5e and the end 5c of the rib 5b.

[0018]

According to the structure of the loudspeaker duct according to the present invention, since it is constructed as described above, the following effects can be obtained.

Since the duct and the paper tube can be connected before the duct is pressed into the enclosure, work efficiency is improved.

Since the length of the main body of the duct can be reduced, the cost is reduced.

Since there is no step between the duct and the paper tube, there is no wind noise, thereby improving the reproduced sound quality.

In addition, it has excellent features such as easy implementation due to its simple structure.

[Brief description of the drawings]

FIG. 1 is a sectional view of a duct assembled to an enclosure.

FIG. 2 is a rear view of the duct.

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

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Speaker enclosure 3 Paper core 5 Duct 5b Rib 5d End face

Claims (1)

(57) [Scope of request for utility model registration] 1. A loudspeaker duct structure comprising a resin duct and a paper tube connected to the rear of the duct, wherein the duct has a flange portion exposed to the outside of the enclosure at a tip thereof, and a longitudinally extending circumferential portion at an outer periphery. A plurality of ribs extending in the direction, the ribs are provided so as to protrude from the rear end of the duct, and a paper tube whose inner diameter matches the inner diameter of the duct is fixed to an inner portion of the protruding rib; A speaker duct structure characterized by being press-fitted into a mounting hole of an enclosure.