JP2001285978A - Bad reflex type enclosure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof bass reflex type enclosure with the high degree of freedom of arrangement. SOLUTION: An envelope 10 is provided with the attaching surface 12 of a speaker 16. One end part of a port 18 is opened on the attaching surface 12, the port 18 is provided with a peripheral wall 20 surrounding a straight line extended from the attaching surface 12 inside the envelope 10 and the inner end part of the peripheral wall 20 is closed. The envelope 10 is arranged in one of a first arrangement state and a second arrangement state for which it is rotated about 90 degrees around the straight line from the first arrangement state and an opening part 22 is formed at a peripheral wall part near the inner end part of the port 18. In either first or second arrangement state, the opening part 22 is positioned at a position away from a vertical plane passing through the straight line below a horizontal plane passing through the straight line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bass reflex type enclosure, and more particularly, to a waterproof type enclosure.

[0002]

2. Description of the Related Art A bass reflex-type enclosure is intended to reproduce bass sound satisfactorily by providing a port (duct) having an opening in a speaker mounting surface of a closed type enclosure in the enclosure. . Since an opening is provided in the speaker mounting surface, rainwater or the like may enter the envelope from this port. Therefore,
Conventionally, a bass reflex type enclosure as shown in FIG. 8 has been used. That is, the speaker 6 is mounted on the speaker mounting surface 4 of the substantially rectangular enclosure 2. Further, a port 8 is mounted on the speaker mounting surface 4. The inner end of the port 8 is curved upward to prevent rainwater or the like from entering the envelope 2.

[0003]

However, in this enclosure, in order to prevent rainwater from entering, the enclosure can be arranged only in a state as shown in FIG. Cannot be placed on its side. That is, there has been a problem that the degree of freedom of arrangement of the enclosure is low. Enclosures that are placed sideways must be manufactured separately with the port's inner end curved upwards while sideways. Further, it is desirable that the port 8 is formed integrally with the speaker mounting surface 4 from the viewpoint of reducing the number of parts and the number of assembling steps. However, port 8
Since it has a curved portion, it cannot be integrally molded with the speaker mounting surface 4, and the number of parts increases and the number of assembling steps increases.

An object of the present invention is to provide a waterproof bass reflex type enclosure having a high degree of freedom in arrangement. Another object of the present invention is to provide a waterproof bass reflex type enclosure that can reduce the number of parts and the number of assembly steps.

[0005]

According to one embodiment of the present invention, a bass reflex type enclosure includes an envelope to which a speaker is mounted. This envelope is a closed type.
One end of a port opens in this envelope, and this port is
The envelope has a peripheral wall surrounding a straight line extending from the opening, and an inner end is closed. The envelope is arranged in one of a first arrangement state and a second arrangement state rotated from the first arrangement state by about 90 degrees about an axis parallel to the straight line. . The port has an opening in a peripheral wall portion near the inner end, and in any of the first and second arrangement states, the port is perpendicular to a horizontal plane passing through the straight line and a vertical surface passing through the straight line. The opening is formed at a position apart from a portion below the horizontal plane.

[0006] In this bass reflex type enclosure, the opening is separated from the vertical plane passing through the straight line below the horizontal plane passing through the straight line, regardless of the first or second arrangement state. Position.
That is, in both the first and second arrangement states, there is no opening below the port. Therefore, in any of the first and second arrangement states, rainwater does not enter the envelope from this opening, so that the arrangement is highly flexible and waterproof.

The opening may be formed by removing a part of an inner end of the port. With this configuration, when the port is molded using the mold, the shape of the mold is simplified, and the manufacture is facilitated.

In addition, the port can be formed integrally with the envelope. In this case, the number of parts and the number of assembling steps are reduced, the manufacturing is facilitated, and the mold used for manufacturing the envelope and the port can be of a relatively simple configuration, which lowers the manufacturing cost. be able to.

A bass reflex type enclosure according to another aspect of the present invention includes an envelope to which a speaker is mounted. One end of the port is open to the envelope, the port has a peripheral wall in the envelope surrounding a straight line extending from the opening, and the inner end is closed. This port is formed integrally with the envelope. In a predetermined arrangement state of the envelope, an opening is formed by removing a part of a peripheral wall portion and an inner end portion above a horizontal plane passing through the port.

[0010] In this bass reflex type enclosure, in the arrangement state, the peripheral wall portion and the inner end portion above the horizontal plane passing through the port are removed to form the opening, so that the waterproofing can be achieved. Moreover, since the port is formed integrally with the envelope and not only the peripheral wall but also a part of the inner end is removed, a relatively simple structure for a mold for integral molding with the envelope is used. Can be used.
In addition, the number of parts and the number of assembly steps can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bass reflex type enclosure according to one embodiment of the present invention has a substantially rectangular parallelepiped envelope 10 as shown in FIG. The envelope 10 is a closed type. As shown in FIG. 1, the envelope 10 is arranged in a vertically long state, and has a mounting surface, for example, a substantially rectangular speaker mounting surface 12 in front of the container. The speaker mounting surface 12 is provided with a circular sound emission hole 14. The envelope 1 is emitted so that sound is emitted from the sound emission hole 14.
0, a speaker, for example, a woofer 16 is disposed,
It is fixed to the inner surface of the speaker mounting surface 12. Although not shown, a tweeter is also provided in the envelope 10.

A port (duct) 18 is formed integrally with the speaker mounting surface 12 so as to be located above the woofer 16. One end of the port 18 is open to the speaker mounting surface 12. This opening and speaker mounting surface 1
The port 18 has a peripheral wall portion 20 extending inward of the envelope 10 so as to surround, for example, a straight line indicated by a chain line in FIG. It is cylindrical. The other end of the port 18 gradually decreases in diameter toward the central axis, and is finally closed.

An opening 22 is formed at the other end of the port 18. As shown in FIGS. 2 and 3, the opening 22 is located on the upper side of four upper and lower regions defined by a horizontal plane passing through the central axis of the port 18 and a vertical plane passing through the central axis. In this case, the peripheral wall and the inner end of one region are removed. The opening 22 has an angle range of about 90 degrees as is apparent from FIG. The opening 22 is located vertically to a horizontal plane passing through the central axis indicated by a dashed line, and away from a portion below the horizontal plane in a plane passing through the central axis.

In the bass reflex type enclosure constructed as described above, as shown in FIG. 4 (a), when the opening 22 is in the first arrangement state above the horizontal plane passing through the central axis, the speaker Even if rainwater enters the port 18 through the opening in the mounting surface 12, the opening 22
Since it is above the horizontal plane passing through the central axis of the port 18, rainwater does not enter the envelope 10 from the opening 22.

Also, in the second arrangement state in which the envelope 10 is rotated counterclockwise by about 90 degrees from the first arrangement state shown in FIG. Since it is located at a position higher than the horizontal plane passing through the axis, the opening 22
Therefore, rainwater does not enter the envelope 10.

Accordingly, since the opening 22 is formed as described above, rainwater infiltrates the envelope 10 regardless of the arrangement state of the envelope 10 in FIG. 4 (a) or (b). And the degree of freedom of arrangement is high.

The opening 22 is formed by removing not only a part of the peripheral wall part 20 but also a part of an inner end part. Therefore, even when the port 18 is formed by a mold, a mold having a simple shape can be used. Further, since the opening 22 is formed by removing not only a part of the peripheral wall part 20 but also a part of an inner end part, the speaker mounting surface 12 is formed.
Even if the and the port 18 are integrally molded, the mold used for the manufacture becomes simple.

The opening area of the port 18 on the speaker mounting surface 12 and the opening area of the opening 22, that is, the total area of the parts indicated by reference numerals a, b, and c are set to be equal. Therefore, this bass reflex enclosure operates in the same manner as a normal bass reflex enclosure.

FIG. 5 shows a port 18a used in a bass reflex type enclosure according to a second embodiment of the present invention. Since the configuration is the same as that of the first embodiment except that the shape of the port 18a is different, the description of the components other than the port 18a is omitted.

The port 18a is formed in a quadrangular prism shape, and an opening 22a is formed by removing a portion near the inner end of the peripheral wall 20a. Like the opening 22 of the port 18 of the first embodiment, the opening 22a also divides the inner surface of the port 18a into four upper and lower regions by a horizontal plane passing through the central axis indicated by a dashed line and a vertical plane passing through the central axis. The peripheral wall 20a of one area on the upper side of the section is removed.

Like the port 18 of the first embodiment, the port 18a prevents rainwater and the like from entering the envelope in both the first and second arrangement states which are different from each other by about 90 degrees. In addition, the enclosure with this port 18a operates similarly to a normal bass reflex enclosure. Moreover, in the bass reflex type enclosure of the second embodiment, when forming the opening 22a, the removal of the inner end of the port 18a is limited to the thickness of the port peripheral wall. Therefore, waterproofness is further improved. In addition, since the inner end is removed as described above, the die can be removed rearward when the port is manufactured, and the manufacturing cost can be reduced. Of course, even in the cylindrical port as in the first embodiment, the removal of the inner end portion can be similarly limited to the thickness of the peripheral wall portion of the port to further enhance the waterproofness.

FIG. 6 shows a bass reflex type enclosure according to a third embodiment of the present invention. This bass reflex type enclosure also has an enclosure 10 similar to the first embodiment.
Attach the woofer 16 to the speaker mounting surface 12 of
A port 18b is provided above it. Port 18b
Has a square opening on the speaker mounting surface 12. However, this opening is arranged in a state where the square is rotated by about 45 degrees. Port 1 from this opening
8 is the envelope 1 similarly to the port 18 of the first embodiment.
In FIG. 7, it extends along the central axis so as to surround the central axis, and gradually curves from the vicinity of the inner end with a radius substantially equal to the length of one side of the opening as shown in FIG. Is closed. An opening 2 is formed in the peripheral wall near the inner end.
2b is formed. The opening 22 is configured to reduce the peripheral wall of one of the upper and lower regions defined by a horizontal plane passing through the central axis of the port 18b and a vertical plane also passing through the central axis to the thickness of the upper region. It has been removed. The cross-sectional area of the port 18b is formed equally from the opening in the speaker mounting surface 12 to the opening 22b at the inner end.

Since the port 18b has a simple shape, it can be easily manufactured. In particular, in the case of manufacturing using a mold, the die can be easily removed rearward, and the manufacturing cost can be reduced. Also, mounting surface 1
Since the cross-sectional area including the curved portion from the opening No. 2 to the inner end opening 22b does not change, the acoustic characteristics are excellent.

In the above three embodiments, the opening 22,
Reference numerals 22a and 22b denote upper ones of four regions separated by a vertical plane and a horizontal plane passing through the central axis.
In both the second arrangement state and the second arrangement state, it was formed at a position above the horizontal plane. However, the present invention is not limited to this. For example, in any of the first and second arrangement states, an opening is provided in a portion below the horizontal plane passing through the central axis in a vertical plane passing through the central axis. The opening can be arranged at various positions as long as it is not located.

In the above three embodiments, each of the openings 22, 22a, and 22b has a 90-degree angle range passing through the central axis. However, the angle range is larger than 90 degrees or smaller than 90 degrees. It may have a range.

In the above three embodiments, port 1
Although 8, 18a and 18b show a columnar shape and a prismatic shape, the shape is not limited to this, and may be, for example, an elliptical shape. In the above embodiment, the ports 18, 18a, and 18b are provided above the speaker 16, but may be provided at various positions below the speaker 16, on the side, and the like. Further, the ports 18, 18a, 18b are provided on the speaker mounting surface 12, but the ports 18, 18a, 18b are provided.
a and 18b do not necessarily need to be provided on the speaker mounting surface 12, and may be provided on the side surface or the back surface of the envelope 10, for example.

In the above three embodiments, the speaker 16
Is provided on the speaker mounting surface 16 provided on the front of the envelope 10, but may be provided on the back of the envelope 10 within the envelope 10.

[0028]

As described above, according to the present invention, it is possible to obtain a bass reflex type enclosure having a high degree of freedom in arrangement and an enhanced waterproof function. Further, according to the present invention, it is possible to obtain a bass reflex-type enclosure having a sufficient waterproof function while reducing the number of parts and the number of assembling steps.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a bass reflex type enclosure according to a first embodiment of the present invention.

FIG. 2 is a partially omitted side view of a port used in the bass reflex type enclosure of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a front view showing a different state of use of the bass reflex enclosure of FIG. 1;

FIG. 5 is a partially omitted perspective view of a port used in a bass reflex type enclosure according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional side view of a bass reflex type enclosure according to a third embodiment of the present invention.

FIG. 7 is a partially omitted perspective view of a port used in the bass reflex type enclosure of FIG. 6;

FIG. 8 is a longitudinal sectional side view of a conventional bass reflex type enclosure.

[Explanation of symbols]

 Reference Signs List 10 envelope 12 speaker mounting surface 16 speaker 18 18a port 20 20a peripheral wall 22 22a opening

Claims (4)

[Claims] An enclosure to which a speaker is attached, a peripheral wall having an opening at one end and surrounding a straight line extending from the opening in the enclosure, and an inner end closed. Wherein the envelope has a first arrangement state and a second arrangement state rotated by about 90 degrees about an axis parallel to the straight line from the first arrangement state. The port has an opening in a peripheral wall portion near the inner end portion, and in both the first and second arrangement states, the port is positioned with respect to a horizontal plane passing through the straight line. A bass-reflex type enclosure in which the opening is formed at a position apart from a portion below a horizontal plane in a vertical plane passing through the straight line in a vertical direction. 2. The bass-reflex type enclosure according to claim 1, wherein the opening is formed by removing a part of an inner end of the port. 3. The bass-reflex enclosure according to claim 2, wherein said port is formed integrally with said envelope. 4. An envelope having a mounting surface to which a speaker is attached, a peripheral wall having one end opened in the envelope and surrounding a straight line extending from the opening in the envelope. A port whose end is closed and formed integrally with the envelope;
A bass reflex enclosure having an opening formed by removing a part of a peripheral wall portion and an inner end portion above a horizontal plane passing through the port in a predetermined arrangement state of the envelope.