JP2624256B2 - Headphone - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to headphones used by being worn in an ear shell.

2. Description of the Related Art In recent years, in addition to a method of crimping a headphone speaker unit from the outside of an ear shell using a conventional headband, a headphone speaker unit having a small size and a structure to be mounted inside the ear shell has been increasing. I have.

Problems to be Solved by the Invention However, in the above-described configuration, the housing cannot fit into the ear shell unless the outer diameter of the housing for housing the speaker unit is set to about 14 mm to 18 mm. However, if the speaker unit is small, there is a problem that the sound quality is unsatisfactory because the reproduction limit of the bass does not become too low.

The present invention has been made in view of the above-described problems, and provides a headphone configured to be able to reproduce to a lower frequency range than before, while at least a part to be inserted into an ear shell is the same as the conventional one.

Means for Solving the Problems To solve the above problems, the headphones of the present invention are:
A front housing having an outer diameter enough to be inserted into the ear shell and having a front sound hole for emitting sound into the ear shell; a rear housing having an outer diameter larger than the front housing; and the rear housing It has one speaker unit for generating sound waves disposed therein and a plurality of non-communicating sound paths disposed between a front surface of the diaphragm of the speaker unit and a front sound hole of the front housing. Each of the front sound holes of the front housing is configured to be an outlet for only sound waves from a corresponding one of the sound paths.

Operation The present invention has the above-described configuration, and the speaker unit arranged at the rear of the large outer diameter can reproduce low-pitched sound to a lower range than before, and the sound wave emitted from the diaphragm travels substantially straight in each sound path. In addition, the sound waves emitted from the respective parts of the diaphragm can be reproduced without interference.

Embodiment A headphone according to a first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional side view, and FIG. 2 is a sectional view taken along the line AA 'of FIG. In the figure, reference numeral 1 denotes a front portion of a housing, 1 'denotes a rubber ring for improving holding properties in an ear, 2 denotes a rear portion of the housing, and accommodates and arranges a speaker unit 3 therein, and 4 denotes a speaker unit. No. 3 diaphragm. 5 and 6 are partitions provided vertically and horizontally inside the housing front part 1, 7 is a sound path formed by partitioning the partition walls 5 and 6, 8 and 9 are front sound holes provided in the housing front part 1, Reference numeral 10 denotes an annular recess provided between the front part 1 and the rear part 2 of the housing;
Is a rear sound hole provided in the housing rear part 2, 12 is an input code, and 13 is a bushing for protecting the input code.

The operation of the headphones configured as described above will be described below.

First, the housing front part 1 of the headphones is inserted into the ear shell. At this time, the concave portion 10 is protruded from the lower part of the ear shell, and is stably held. Since the rear part 2 of the housing houses the speaker unit 3 inside, the outer diameter is larger than that of the front part 1 of the housing.
The housing front 1 is inserted deep into the ear shell. here,
Sound waves emitted from the diaphragm 4 of the speaker unit 3
If there is no 5,6, the sound emitted from each part of the diaphragm interferes when reaching the ear from the front sound holes 8,9 of the front part 1 of the housing, and is enhanced or attenuated at a certain frequency. There are peaks and valleys in the characteristics, giving the sound quality with a habit. Therefore,
In this way, the sound paths divided finely by the partition walls 5 and 6 are made, and as shown in the drawing, each sound path does not communicate with each other from immediately before the diaphragm 4 to each sound hole. Means that only sound from the corresponding sound path is guided, so that sound waves emitted from the diaphragm pass through one sound path while being reflected by the walls of the partition walls 5 and 6, so that other sound The sound can reach the ear through the front sound holes 8 and 9 without interfering with the sound that has passed through the road, and there is no peak or valley due to interference in the frequency characteristics. Here, although not shown, the sound path 7
It is possible to insert a sound absorbing material or a damping material inside to control the frequency characteristics of the sound wave. As an example of the sound absorbing material or the damping material, for example, a material such as a soft plastic or a rubber having communicating cells or a nonwoven fabric is used as necessary.

In FIG. 5, an example of the improved frequency characteristic in the first embodiment is shown by a solid line, and an example of the frequency characteristic when the partition walls 5 and 6 are not provided is also shown by a broken line.

As described above, according to the present embodiment, between the housing front portion 1 having the front sound holes 8 and 9 and the speaker unit 3 housed in the housing rear portion 2 having a larger diameter.
By arranging the plurality of sound paths 7 formed by the vertical and horizontal grid-like partition walls 5 and 6, it is possible to prevent interference of sound waves emitted from each part of the diaphragm 4. Therefore, the speaker unit 3
Can be lowered to the rear and placed outside the ear shell, the outer diameter of the speaker unit 3 can be made larger than in the past, and the deep bass that was difficult with the conventional headphones inserted into the ear shell can be reduced. It can be reproduced.

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a side sectional view of the second embodiment, and FIG.
It is sectional drawing of the -B 'part. In the figures, those having the same functions as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

A plurality of cylindrical partition walls 14 are provided in the housing front part 1 concentrically with respect to the center of the diaphragm 4, and the inside of the cylindrical partition wall 14 serves as a sound path 15 on the front surface and the front surface of the diaphragm 4. The portion outside the partition 14 communicates with the sound hole 8, and another portion of the partition 14 communicates between the front surface of the diaphragm 4 and the front sound hole 9. If necessary, as in the first embodiment, the sound path 15
Alternatively, a sound absorbing material or a damping material may be inserted into 16 to control the frequency characteristics of the sound wave.

In the headphones of the second embodiment configured as described above, similar to the first embodiment, the same operation and effect can be obtained by inserting and using the front part 1 of the headphone housing in the ear shell. Can be obtained. That is, in the case of the second embodiment, the sound wave emitted from the diaphragm 4 of the speaker unit 3 is guided to the sound hole 8 through the sound path 15 by the cylindrical partition wall 14, and the sound wave of the other parts is transmitted through the sound path 16. It is led to the sound hole 9. A sound absorbing material or a damping material (not shown) may be provided in the sound path 15 or 16 to selectively adjust the frequency characteristics.

In the above embodiment, the sound absorbing material or the damping material inserted into the sound path can be used not only for controlling the frequency characteristics but also for controlling the balance between high and low sounds.

Further, in the above embodiment, the cross section of the sound path has been described as a square or a circle, but may be another shape such as a triangle. Furthermore, although the front part of the housing, the rubber ring, and the rear part of the housing have been described as being cylindrical, these may have an elliptical cross-section or any other appropriate shape in consideration of how they fit into the ears and design considerations.

Further, although the description has been made with one ear in the figure, it is obvious that both ears and stereo earphones can be used.

Effect of the Invention As described above, the headphones of the present invention have a front housing having an outer diameter dimension that can be inserted into the ear shell and having a front sound hole for emitting sound inside the ear shell, A rear housing having an outer diameter larger than that of the housing; and a first housing for generating a sound wave disposed inside the rear housing.
Speaker units, and a plurality of non-communicating sound paths disposed between the front surface of the diaphragm of the speaker unit and the front sound holes of the front housing. Each corresponds to one of the sound paths
It is an outlet for only sound waves from the individual, and the sound waves emitted from the diaphragm pass through while reflecting in one sound path, so that the front sound without interfering with the sound that has passed through the other sound path Can reach the inside of the ear from the hole, frequency characteristics,
It is possible to prevent the occurrence of peaks and valleys due to interference of sound waves emitted from various parts of the diaphragm of the speaker. Therefore, the position of the speaker unit can be lowered to the rear, and placed outside the ear shell, so that the outer diameter of the speaker unit can be made larger than in the conventional case. This is an extremely effective invention that can realize very excellent headphones that can reproduce bass sounds.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a headphone according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line AA 'in FIG. 1, and FIG.
FIG. 4 is a side sectional view of the headphones according to the second embodiment of the present invention, FIG. 4 is a sectional view taken along the line BB 'in FIG. 3, and FIG. 5 is a diagram showing frequency characteristics of the headphones according to one embodiment of the present invention. It is. 1 ... front part of housing, 2 ... rear part of housing, 3 ...
Speaker unit, 4 ... diaphragm, 5, 6 ... partition, 7 ...
… Sound path, 8,9… front sound hole, 14… cylindrical partition wall, 15, 16…
Sound path

Claims (4)

(57) [Claims] 1. A front housing having an outer diameter enough to be inserted into an ear shell and having a front sound hole for emitting sound into the ear shell, and a rear housing having an outer diameter larger than the front housing. A speaker unit for generating sound waves arranged inside the rear housing; and a plurality of non-communicating plurality of speakers arranged between a front surface of a diaphragm of the speaker unit and a front sound hole of the front housing. A headphone having a sound path, wherein each of the front sound holes of the front housing is an outlet for only sound waves from a corresponding one of the sound paths. 2. The headphone according to claim 1, wherein the sound path is formed by a grid-like partition plate. 3. The headphone according to claim 1, wherein the sound path is formed by a plurality of cylindrical partition walls. 4. The headphone according to claim 1, wherein the sound path is formed by a plurality of cylindrical partition walls arranged concentrically with respect to the center of the diaphragm of the speaker unit.